Which is a valid C variable declaration?Question 5Select one:a.int main;b.int $name;c.int age;d.int &temp;e.int name#;

The valid C variable declaration among the options is:

c. int age;

Explanation:

In C, a variable declaration must start with a type specifier, like int, followed by the variable name. The variable name must start with a letter (either uppercase or lowercase) or an underscore, and can be followed by letters (either uppercase or lowercase), digits or underscores.

a. int main; - This is valid, but it's typically used as the function name for the entry point in a C program, not a variable.

b. int $name; - This is not valid in C. The$ character is not allowed in variable names.

c. int age; - This is a valid variable declaration in C.

d. int &temp; - This is