1.

\eqalign{ & 1 - \left[ {1 - \left\{ {1 - \left( {1 - \overline {1 - 1} } \right)} \right\}} \right] \cr & 1 \cr} $$

A. 0
B. 1
C. 2
D. 3
E. None of these
Answer» B. 1


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