Fill in the blanks.
( $\mathrm{i}$) Two lines in a plane not having any point common are called P lines.
( $\mathrm{i}\mathrm{i}$) The edges of a surface are Q .
( $\mathrm{i}\mathrm{i}\mathrm{i}$) Two distinct planes can intersect at R points.
( $\mathrm{i}\mathrm{v}$) S planes can pass through two distinct points.
         P           Q             R                         S
(A) Parallel    lines         Infinite              infinite
(B) Parallel    planes          one                 one
(C) Perpendicular  lines    one          zero
(D) Perpendicular  planes   infinite   infinite