Identify the option that does not represent a valid binary number.
Explanation
Options A, B, D, and E contain only digits 0 and 1, which are valid in binary numbers. Option C includes digits other than 0 and 1, so it is not a binary number.
Options A, B, D, and E contain only digits 0 and 1, which are valid in binary numbers. Option C includes digits other than 0 and 1, so it is not a binary number.