Which terms must be removed from the sum
\frac12 \plus{} \frac14 \plus{} \frac16 \plus{} \frac18 \plus{} \frac1{10} \plus{} \frac1{12}
if the sum of the remaining terms is equal to 1?
<spanclass=′latex−bold′>(A)</span>41 and 81<spanclass=′latex−bold′>(B)</span>41 and 121<spanclass=′latex−bold′>(C)</span>81 and 121<spanclass=′latex−bold′>(D)</span>61 and 101<spanclass=′latex−bold′>(E)</span>81 and 101