Question

For which kind of letter is the following sentence appropriate?
We certainly thank you for your timely suggestion. (This question has multiple correct options)
a) Formal
b) Informal
c) Semi-formal
d) Business

Answer 1

Hint:Letters are written messages sent to people to communicate, and exchange information. A letter can be classified into two broad categories, these are: Formal and Informal.
Formal letters are written in accordance to official work which can be related to some work, business, trade, and allowance or requesting for a permission from someone outside family.
Informal letters are written to family, friends and relatives.

Complete step by step answer:
a) Formal: The sentence can be used in a formal letter as this would suggest that we were grateful for the feedback and might have asked for one.
b) Informal: The sentence cannot be used in an informal letter as informal letter is used for people that are our family and friends.
c) Semi-formal: The sentence can be used in semi-formal type of letters as the context is of some business affairs and the receiver is grateful for the timely feedback.
d) Business: This is also a type of formal letter and the sentence can be used in this format of letters as feedback are an important aspect of business.

Note:
 The sentence can be used in all the mentioned formats except option – b: informal letters. In informal letters we can freely comment or suggest about anything without thanking anyone for their input or feedback. The given line is hence is not suitable for informal letters.