In an informal letter, date is mentioned __________.

The correct answer is Option (3) → before salutation

Format of an informal letter:

• The parts come in this order:
  • sender's address, at the top;
  • date, just below the address;
  • salutation (Dear Riya, My dear father);
  • body;
  • subscription, the closing (Yours lovingly) with the name.
• So the date is written at the top, before the salutation.

Why the Other Options are Incorrect?

Option 1: before subscription — Incorrect. The subscription is the closing at the end; the space just before it holds the end of the body, not the date.

Option 2: after subscription — Incorrect. Nothing but the writer's name follows the subscription; the date is at the top.

Option 4: at last — Incorrect. The date is not written at the end of the letter; it comes near the beginning.