The letter V is a _____

character literal constant
numeric literal constant
string literal constant
variable

The correct answer is: A. character literal constant.

A character literal constant is a single character enclosed in single quotes. For example, ‘A’, ‘a’, and ‘?’ are all character literal constants.

A numeric literal constant is a number that is written without any special characters. For example, 1, 2, and 3 are all numeric literal constants.

A string literal constant is a sequence of characters enclosed in double quotes. For example, “Hello, world!” is a string literal constant.

A variable is a named location in memory that can store a value. The value of a variable can be changed at any time.

In the question, the letter V is a single character that is enclosed in single quotes. Therefore, it is a character literal constant.