( 11/2 + 111/2 + 1111/2 + 11111/2 ) is equal to = ?

Answer: Option D

$$\begin{array}{rl}& \text{Given expression,}\\ & \left(1+11+111+1111\right)+\left(\frac{1}{2}\times 4\right)\\ & =1234+2=1236\end{array}$$