Straight forward,
S1, p can be any prime no. which can give infinite values of q. Insufficient.
S2, q = -2p will give a definite value of p and q. Sufficient.
Option B is correct.
S1, p can be any prime no. which can give infinite values of q. Insufficient.
S2, q = -2p will give a definite value of p and q. Sufficient.
Option B is correct.
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