Correct Answer:
C. 202
The correct answer is 202 because a binary number system is based on only two digits: 0 and 1.
- Binary System: It is a base-2 number system used in computers for all internal processing.
- Valid Binary Digits: Only 0 and 1 are allowed in binary representation.
- Why 202 is Incorrect (Binary-wise): The digit \'2\' is not part of the binary system, so 202 cannot be a valid binary number.
- Why Other Options Are Correct:
- 001, 101, and 110 contain only 0s and 1s, so they are valid binary numbers.