110 + 1/4 is equal to = ?

Answer: Option D

$$\begin{array}{rl}& \text{According to question,}\\ & \sqrt{110+\frac{1}{4}}\\ & \Rightarrow \sqrt{\frac{441}{4}}\\ & \Rightarrow \frac{21}{2}\\ & \Rightarrow 10.5\end{array}$$