(A) Apostrophe
(B) Colon
(C) Semi Colon
(D) Comma
🧠 Explanation:
- The phrase “Dear friend, I need your help.” requires a comma after “Dear friend”.
- This is a standard format in informal or formal letter writing.
- The comma separates the salutation from the main body of the sentence.
- Using a colon or semicolon here would be grammatically incorrect.