The output of the following gate is 0 only if at least one of the inputs is 1: A. AND gate B. OR gate C. EX-OR gate D. NOR gate E. None of the above

The other options are incorrect because:

• An AND gate produces a true output only if both of its inputs are true.
• An OR gate produces a true output if either of its inputs is true.
• An EX-OR gate produces a true output if its inputs are different.
• None of the above is a valid option.