Choose an appropriate form of Greeting in an Informal letter, is:

The correct answer is Option (1) - My Dear Mother

The appropriate form of greeting in an informal letter is: My Dear Mother

• "My Dear Mother" is a warm and personal way to greet someone in an informal context, making it suitable for letters to family or close friends.
• The other options—"Respected Sir,", "Dear Sir,", and "The Most Reverend"—are formal greetings typically used in business correspondence or letters to individuals of higher authority.