137- If $A = \{1,2,\{1,2\},\{1,\{1,2\}\},\{2\}\}$ and $B = \{\{1\},\{1,2\}\}$, the number of subsets of $A \cap B'$ is which of the following? (1) $4$ (2) $16$ (3) $32$ (4) $33$
\textbf{137-} If $A = \{1,2,\{1,2\},\{1,\{1,2\}\},\{2\}\}$ and $B = \{\{1\},\{1,2\}\}$, the number of subsets of $A \cap B'$ is which of the following?
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(1) $4$ \hfill (2) $16$ \hfill (3) $32$ \hfill (4) $33$
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