106. Which logic gate is represented by the following combination of logic gate ?

 

106. Which logic gate is represented by the following combination of logic gate ?

(a) NAND

(b) AND

(c) NOR

(d) OR

Answer :  (b) AND

\( Y_1 = \overline{A} \)

\( Y_2 = \overline{B} \)

\( Y = \overline{\,\overline{A} + \overline{B}\,} \)

\( = \overline{\overline{A}} \cdot \overline{\overline{B}} \)

\( A \cdot B \)