While an object is in projectile motion (with upward being positive) with no air resistance
a) The horizontal component of its velocity remains constant and the horizontal component of its acceleration is equal to -g.
b) The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to -g.
c) The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to zero.
e) The vertical component of both its velocity and its acceleration remains constant.
f) The vertical component of both its velocity and its acceleration remains constant.