आरक्षण के अनुसार सीट इस कोच में है।

It literally means according to the reservation.

In this kind of sentence, आरक्षण usually means a booking or reserved-seat record, especially in a train context. So the phrase is basically saying that the location of the seat is being stated based on what the reservation says.

Because अनुसार is used in a fixed pattern meaning according to or in accordance with.

So you learn it as a chunk:

• X के अनुसार = according to X

Examples:

• नियमों के अनुसार = according to the rules
• योजना के अनुसार = according to the plan
• आरक्षण के अनुसार = according to the reservation

So here, it is best to treat के अनुसार as one structure.

Because Hindi uses an oblique form before a postposition such as में.

• यह = direct form
• इस = oblique form

So:

• यह कोच = this coach
• इस कोच में = in this coach

The same thing happens with वह:

• वह कोच = that coach
• उस कोच में = in that coach

Here कोच means a train coach, carriage, or compartment.

It is a common English loanword in Hindi. In railway Hindi, people also very often use डिब्बा for the same basic idea.

So:

• इस कोच में = in this coach
• इस डिब्बे में = in this compartment

Both are understandable, though कोच sounds especially natural in modern railway usage.

में is a postposition meaning in, inside, or within.

So:

• कोच में = in the coach

English uses prepositions before the noun, but Hindi usually uses postpositions after the noun. That is why में comes after कोच, not before it.

Hindi normally puts the main verb at the end, so the sentence order often feels reversed to an English speaker.

Here the structure is:

• आरक्षण के अनुसार = according to the reservation
• सीट = the seat
• इस कोच में = in this coach
• है = is

So a very literal order would be:

According to the reservation, seat this coach in is.

That sounds odd in English, but it is completely normal in Hindi.

Because Hindi does not have articles like a, an, and the.

Whether सीट means a seat or the seat depends on context. In this sentence, the context makes it clear that it means the seat or your seat, even though Hindi does not use a separate word like the.

Because सीट is singular.

• है = is
• हैं = are

So:

• सीट इस कोच में है = the seat is in this coach
• सीटें इस कोच में हैं = the seats are in this coach

In other words, the verb is singular because the subject is singular.

सीट is usually treated as feminine in Hindi.

For example, you would normally hear:

• मेरी सीट = my seat

not

• मेरा सीट

In this sentence, though, you cannot tell the gender from है, because है is used for both masculine and feminine singular subjects.

Yes. In real-life situations, Hindi often makes this more explicit:

• आरक्षण के अनुसार आपकी सीट इस कोच में है।

That means According to the reservation, your seat is in this coach.

In the original sentence, आपकी is simply omitted because the context already makes it obvious whose seat is being discussed.