You may choose the book.

The book may be choose by you.
The book may be chosen by you.
The book may choose by you.
The book is chosen by me.

The correct answer is: B. The book may be chosen by you.

The other options are incorrect because they do not use the correct verb tense. The sentence “You may choose the book” is in the present tense, so the verb in the subordinate clause should also be in the present tense. Option A, “The book may be choose by you,” uses the past tense verb “choose.” Option C, “The book may choose by you,” uses the infinitive verb “choose.” Option D, “The book is chosen by me,” uses the present tense verb “choose” but in the passive voice.

The sentence “You may choose the book” means that you have the option of choosing the book. It does not mean that the book has already been chosen by you or that someone else will choose the book for you.