An integer greater than 1 is prime if it is divisible only by 1 and itself and 1. Is n prime?
1) n is between 1 and 4,
2) n^2-5n+6=0

Ans is D but i chose b. my thought process was- Although n is in between 1 and 4, there is no way of knowing whether n is an integer. Can someone please explain?