Which of the following sentences is an optative sentence?

Optative Sentence:
- ইচ্ছা বা প্রার্থনা বুঝালে তাকে Optative sentence বলে।
- Structure: May + subject + verb + extension.

তাই গঠন অনুযায়ী,
- 'May you have a long life' বাক্যটি হবে Optative sentence.

Other Options:
Close the door- Imperative Sentence.
She is reading a book- Assertive Sentence.
How happy you are!- Exclamatory Sentence.

Source: Advanced Learner's English Grammar & Composition.