यह खुराक सही है।

A word-by-word breakdown is:

• यह = this
• खुराक = dose, ration, intake, or sometimes diet/feed, depending on context
• सही = correct, right, proper
• है = is

So the sentence structure is basically:

• यह
  • खुराक
    • सही
      • है
• This dose is correct.

Hindi usually follows Subject–Object/Complement–Verb order, so the verb often comes at the end.

In this sentence:

• यह खुराक = this dose
• सही = correct
• है = is

So Hindi says something like:

• This dose correct is

That is completely normal in Hindi. The main verb है usually comes last in simple sentences like this.

यह commonly means this, but in Hindi it can also function like he, she, or it when referring to someone or something near the speaker or already being pointed out.

In this sentence, यह is being used adjectivally before a noun:

• यह खुराक = this dose

So here it clearly means this.

Not always. खुराक can mean different things depending on context, such as:

• dose of medicine
• ration
• food intake
• feed for animals
• dietary portion

In यह खुराक सही है।, if the context is medicine, This dose is correct is very natural. In another context, it might mean This amount of food is right or This ration is correct.

खुराक is generally feminine in Hindi.

Yes, gender matters in Hindi, but in this sentence you do not see a visible change on every word.

• सही is an adjective that often stays the same in masculine and feminine forms.
• है is singular, and it does not show gender by itself in the present tense.

So even though खुराक is feminine, the sentence still appears as:

• यह खुराक सही है।

If you used an adjective that changes with gender, you would see it more clearly. For example:

• यह खुराक अच्छी है। = This dose/food portion is good.

Here अच्छी shows feminine agreement with खुराक.

Hindi usually does not use articles like a, an, or the.

So where English says:

• This is the correct dose
• This dose is correct

Hindi can simply say:

• यह खुराक सही है।

The exact English article often has to be supplied from context.

A simple learner-friendly pronunciation is:

• yah khu-raak sa-hee hai

A few notes:

• यह is often pronounced more like yah in everyday speech.
• ख is an aspirated k sound, so खुराक begins with a breathy kh.
• सही sounds like sa-hee.
• है is usually pronounced roughly like hai.

A more natural spoken rhythm might be:

• yah khuraak sahi hai

This is a very common question.

In careful standard Hindi:

• यह = this
• ये = these

But in everyday speech, many speakers pronounce यह as ये.

So you may hear:

• ये खुराक सही है

even when the meaning is singular: This dose is correct.

In formal writing, यह is the standard singular form.

Yes. That changes the emphasis slightly.

• यह खुराक सही है। = This dose is correct.
• यह सही खुराक है। = This is the correct dose.

Both are grammatical, but they are not exactly identical in focus:

• यह खुराक सही है focuses on the quality of this dose
• यह सही खुराक है identifies this as the correct dose

है is the present-tense form of to be for singular subjects.

Here it links the subject and description:

• यह खुराक = subject
• सही = description
• है = is

So it works just like is in English.

If the subject were plural, you would usually use हैं instead:

• ये खुराकें सही हैं। = These doses are correct.

Yes, very naturally.

In a medical setting, खुराक often means:

• a dose of medicine
• the dosage amount

So a doctor, pharmacist, or caregiver might say:

• यह खुराक सही है। = This dose is correct.

If you want to be even more specific, Hindi also often uses डोज़ or phrases like दवा की खुराक:

• दवा की यह खुराक सही है। = This dose of medicine is correct.

You add नहीं before है:

• यह खुराक सही नहीं है। = This dose is not correct.

This is the usual position for नहीं in this kind of sentence:

• subject + description + नहीं
  • है

A simple yes/no question is:

• क्या यह खुराक सही है? = Is this dose correct?

Here क्या at the beginning marks the sentence as a yes/no question.

In speech, intonation also helps. Without क्या, a rising tone can sometimes make it sound like a question, but for learners, using क्या is the safest pattern.