A PHP variable name a. can be a PHP reserved word b. can start with a letter, a digit, or two underscores c. can contain special characters d. is case-sensitive

The correct answers are c. can contain special characters d. is case-sensitive

Explanation:

Variable can be referred to as a container used for storing values such as numeric values, memory addresses, characters, character string so it can be used in any part of the program. Every programming language has rules that you must strictly follow while naming a variable, and some of the rules for naming variable in PHP are A variable name can contain letters, numbers, and characters after the first character and A variable name is case sensitive.