The gates required to build a half adder are
(A) EX-OR gate and NOR gate (B) EX-OR gate and OR gate
(C) EX-OR gate and AND gate (D) Four NAND gates.
(A) EX-OR gate and NOR gate (B) EX-OR gate and OR gate
(C) EX-OR gate and AND gate (D) Four NAND gates.