Which of the following 'Cs' are characteristics of a formal letter.

(A) Courteous
(B) Complaining
(C) Concise
(D) Confidential
(E) Cognizant

Choose the correct answer from the options given below:

(A) and (C) Only

The correct answer is Option (3) → (A) and (C) Only

• Courteous (A): Formal letters use respectful and polite language.
• Complaining (B): While some formal letters might express dissatisfaction, the overall tone should remain professional and objective.
• Concise (C): Formal letters should be clear and to the point, avoiding unnecessary details.
• Confidential (D): Confidentiality may be a characteristic depending on the content of the letter, but it's not a defining feature of a formal letter format itself.
• Cognizant (E): This implies being aware or knowledgeable, which isn't a specific characteristic of a formal letter's style.

Therefore, only courteous and concise language are universally considered defining features of a formal letter.