Data Sufficiency (DS) | Re: Is r*s a prime number?

Statement-1
S is prime no. No information about S.
Take s=2, 2*1= 2 prime
2.*1/2= 1 not prime.

Statement- 2
R is positive integer
Take r=1, 1*2 prime
1*4 not prime.

Statement 1+2
S prime, and r positive integer,
s= 2, r= 1 will lead 1*2=2 prime
s= 2, r=2 will lead 2*2 = 4 not prime.

E is answer.

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