(i) a perspective projection only---->d)Requires homogeneous coordinates in order for it to be encoded into a linear transformation
(ii) an orthographic projection only---> c)Far away objects appear the same size as closer ones (as orthographic projection preserve dimensions)
(iii) both orthographic and projective transformations ---->a)Straight lines are mapped to straight lines (in both)
(iv) neither orthographic nor projective transformation.--->b)Distances and angles are (in general) preserved
hence ans is option C)d,c,a,b