GATE EC 2022 Set 1 Q39 — Combinatorial Circuits

Consider a Boolean gate $\text{(D)}$ where the output $Y$ is related to the inputs $A$ and $B$ as, $Y = A + \overline{B},$ where $+$ denotes logical $\text{OR}$ operation. The Boolean inputs $’0’$ and $’1’$ are also available separately. Using instances of only $\text{D}$ gates and inputs $’0’$ and $’1’,$ _______________ (select the correct option(s)).