Question

Statement 1: Friction always acts as a foe.

Statement 2: It is convenient to pull luggage fitted with rollers.

Answer 1

Statement 1 is incorrect because without friction we would not be able to walk, run or move on the ground. So its not true that friction is always a foe.

Statement 2 is correct because rolling reduces friction. It is always easier to roll than to slide a body over another. Rolling friction is always lesser than sliding friction. Hence it is convenient to pull luggage fitted with rollers.
So option B is correct.