Which of the following is an example of subscription in a letter?

Yours faithfully

The correct answer is Option (4) - Yours faithfully

The example of subscription in a letter is: Yours faithfully

12 A, Modal Town - is an example of an address.

Dear Sir is an example of a salutation.

Requesting issue of duplicate Driver's Licence is an example of the subject or the purpose of the letter.

Yours faithfully is an example of a subscription, which is a polite closing phrase used to end a letter.