In $3D$ Graphics, which of the following statements about perspective and parallel projection is/are true?
P : In a perspective projection, the farthest an object is from the center of projection, the smaller it appears
Q : Parallel projection is equivalent to a perspective projection where the viewer is standing infinitely far away
R : Perspective projections do not preserve straight lines.
Choose the correct answer from the code given below:
$Code:$
- P and Q only
- P and R only
- Q and R only
- P, Q and R