yes. That is True. A buisness letter is formal, and uses profession writing and formatting. A friendly letter is playful, and does not need to be formal, and respectful. (In writing terms) A buisness letter is professional and serious. It is True.
~Silver
Answer:
my friend name is raj. he's is my best friend
D he must watch out for Macduff
The answer is A and C combined so final answer is D