In a Digital circuit, what is 1 ‘AND’ 1?

The correct answer is B. 1.

In a digital circuit, AND is a logic gate that produces a 1 output only if both of its inputs are 1. If either input is 0, the output is 0.

In this case, both inputs are 1, so the output is 1.

Option A is incorrect because 0 is the output when either input is 0.

Option C is incorrect because 2 is not a valid output for an AND gate.

Option D is incorrect because 4 is not a valid output for an AND gate.