The logic gates in which all the inputs must be low to get a high output are

Step-by-step solution

Truth table for AND, OR, NAND and NOR gate for two input A and B are given below. AND gate array |ccc| & B & Output Y=A B 0 & 0 & 0 0 & 1 & 0 1 & 0 & 0 1 & 1 & 1 array OR gate array |llc| & B & Output Y=A+B 0 & 0 & 0 0 & 1 & 1 1 & 0 & 1 1 & 1 & 1 array NOR gate array |cccc| & B & A+B & Output Y= A + B 0 & 0 & 0 & 1 0 & 1 & 1 & 0 1 & 0 & 1 & 0 1 & 1 & 0 & 0 array NAND gate array |rrrc| & B & A+B & Output Y= A B 0 & 0 & 0 & 1 0 & 1 & 0 & 1 1 & 0 & 0 & 1 1 & 1 & 1 & 0 array From above truth tables, it is clear that in