Answer: A) a parabola Explanation: Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So by Newton's first law, it continues its motion horizontally with that velocity. But then, it is also pulled down by earth's gravity continuously. In this situation its horizontal motion gives way to the parabolic motion until it reaches the ground.

Answer: C) If neither I nor II is strong Explanation: Simply saying that a thing can be abused is a simplistic argument. This applies to everything and is hence weak unless you specify the reason for abuse. Hence I is weak. II is weak because it is just not true.