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Then if p and r are primes, combining both stmt 1 and 2, r <> 2, then r + p = 17, 15 + 2 = 17 but then r(15) is not prime.
I say E.
N=P+R (from stem)
N = Odd (from stem)
Now, for N to be odd, either P or R shld be even and the other odd (E+O = O)
Also, P & R are prime (from S1)
Hence one of them shld be 2 (even prime)and the other an odd prime to satisfy the condn that N is odd.
To figure out which one of P & R is equal to 2, look at St2
St 2 : R <>2.
This implies that P has to be equal to 2