Which of the following salutations does NOT suit a formal letter?

The correct answer is Option (2) → Dear Ritu

A first name alone is how we greet a friend or a relative. A formal letter needs a polite salutation (greeting), such as “Sir”, “Madam” or the reader’s title and surname. So “Dear Ritu” does not suit a formal letter.

Why the Other Options are Incorrect?

Option 1: Madam — Incorrect. It is a polite greeting that suits a formal letter to a woman official.

Option 3: Dear Sir/Madam — Incorrect. It suits a formal letter when the writer does not know whether a man or a woman will read it.

Option 4: Dear Dr Menon — Incorrect. It suits a formal letter when the writer knows the reader’s name.