Which of the following elements comes last in a business letter?

The correct answer is Option (2) → Signature

The parts of a business letter come in a fixed order: the sender's address and the date at the top, then the receiver's address, the salutation and the subject, the body of the letter, the complimentary close (the courteous leave-taking, such as "Yours faithfully"), and finally the signature with the writer's name and designation below it. The signature is therefore the last element.

Why the Other Options are Incorrect?

Option 1: Date — Incorrect. The date is written near the top, with the sender's address.

Option 3: Body of the letter — Incorrect. The body comes in the middle, after the salutation and before the close.

Option 4: Courteous leave taking — Incorrect. The leave-taking ("Yours faithfully") comes just before the signature, not after it.