Q. In which of the following gates the output is 1 if and only if at least one input is 1?
✅ Correct Answer: (D)
or
Explanation: in or gate we need at least one bit to be equal to 1 to generate the output as 1 because or means any of the condition out of two is equal to 1 which means if at least one input is 1 then it shows output as 1.