What will be the answer for this ? I need it with explanation

Question

def h(n):
f = 0
for i in range(1,n+1):
if n%i == 0:
f = f + 1
return(f%2 == 1)

1.n is a multiple of 2
2.n is a composite number
3.n is a prime number
4.n is a perfect square