Choose the correct option to close a letter written to a friend:

The correct answer is Option (4) → Yours affectionately

Closing a letter (subscription):

• The closing words of a letter depend on how close the writer is to the reader.
• Informal letters to friends and relatives close with warm words: Yours affectionately, Yours lovingly, Your loving friend.
• Formal letters close with Yours faithfully, Yours truly or Yours sincerely.
• This letter: a friend is close to the writer, so Yours affectionately, which shows warmth and love, is the fitting close.
  Example: Riya ended her letter to her school friend with "Yours affectionately".

Why the Other Options are Incorrect?

Option 1: Yours truly — Incorrect. Yours truly is a formal close, used in business letters; it sounds cold in a letter to a friend.

Option 2: Yours obediently — Incorrect. Yours obediently is used in official letters to a superior, such as an application to a principal; it would be odd in a letter to a friend.

Option 3: Yours sincerely — Incorrect. Yours sincerely is used in formal letters where the reader is addressed by name, and in letters to people one knows but is not close to. For a friend, the warmer Yours affectionately is the better close.