(A) : Generally the path of a projectile from the earth is parabolic but it is elliptical for projectile going to a very great height.
(R) : Up to ordinary height the projectile moves under a uniform gravitational force, but for great heights, projectile moves under a variable force.

As we go up from the surface of the earth , the gravity decreases which decreases the acceleration due to gravity. For large height, acceleration due to gravity changes significantly. Hence , the path of the projectile deviates from parabolic path and shifts towards elliptical nature.