1.

Simplify\[\left( \frac{1}{2}+ \right.\] \[\frac{1}{6}+\] \[\frac{1}{12}+\] \[\frac{1}{20}+\] \[\frac{1}{30}+\] \[\frac{1}{42}+\] \[\frac{1}{56}+\] \[\frac{1}{72}+\] \[\frac{1}{90}+\] \[\frac{1}{110}+\]\[\left. \frac{1}{132} \right)\div \frac{11}{12}\]

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


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