If [p] means the greatest positive integer less than or equal to p, then [ - 1/4 ] + [ 4 - 1/4 ] + [ 3 ] is equal to?

Answer: Option D

Given [p] means the greatest positive integer less than or [p] equal to p
$$\begin{array}{rl}& \Rightarrow \left[\text{p}\right]=\text{ p}\\ & \Rightarrow \left[-\text{p}\right]=\text{ p}\\ & \Rightarrow \left[-\frac{1}{4}\right]\text{ + }\left[4-\frac{1}{4}\right]+\left[3\right]\\ & \Rightarrow \frac{1}{4}+4-\frac{1}{4}+3\\ & \Rightarrow 7\end{array}$$