If you are writing a letter to the Housing Department to repair a lock, you would begin the letter with ________.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Dear Sir or Madam
A letter to a government department is a formal letter. When the name of the officer is not known, the formal salutation is "Dear Sir or Madam" (or "Sir/Madam").
Why the Other Options are Incorrect?
Option 1: Dear friend — Incorrect. It is a salutation for an informal letter to someone one knows well.
Option 2: Hi — Incorrect. "Hi" is a casual greeting, unsuitable for any official letter.
Option 4: None of these — Incorrect. Option 3 is the right salutation.