Consider two statements S1 and S2 followed by a question:
S1: p and q both are prime numbers.
S2: p + q is an odd integer.
Questions: Is pq an odd integer?
Which one of the following is correct?
1
S1 alone is sufficient to answer the question
2
S2 alone is sufficient to answer the question
3
Both S1 and S2 taken together are not sufficient to answer the question
4
Both S1 and S2 are necessary to answer the question