Logic Gates question from NEET 1998 (AIPMT)

Answer: (c)

1. (a) NAND with $1, 1$: $\overline{1 \cdot 1} = 0$.
2. (b) NOR with $1, 1$: $\overline{1 + 1} = 0$.
3. (c) NAND with $0, 1$: $\overline{0 \cdot 1} = 1$.
4. (d) XOR with $0, 0$: $0 \oplus 0 = 0$.
5. So the answer is (c).