Learn Farsi: انتخابِ او بد بود.

There isn't a separate word for 'his'. Instead, Farsi uses the standard pronoun او (he/she) and connects it to the noun انتخاب (choice) using the ezâfe (the hidden 'e' sound connecting the words). So, انتخابِ او literally means 'choice of him', which translates smoothly to 'his choice'.

Could this sentence also mean 'her choice'?

Yes! Farsi pronouns do not have grammatical gender. The word او stands for both 'he' and 'she'. Therefore, انتخابِ او could mean 'his choice' or 'her choice', and you would figure out which one based on the conversation's context.

Since we are learning the negative simple past, how would we say 'His choice was not bad'?

To make the past tense of 'to be' negative, you attach the na- prefix directly to the front of the verb. So, بود (was) becomes نبود (was not). The negative sentence is simply انتخابِ او بد نبود.

Is the Farsi word بد related to the English word 'bad'?

They mean the exact same thing and sound almost identical! Because English and Farsi are part of the same massive language family (Indo-European), they share a few distant ancestral root words. This makes بد an exceptionally easy vocabulary word to remember.