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1. If P^Q = 1 then P = 1 or Q = 0. consider p = 2 then Q has to be 0. P = 1 then Q can be anything. not suff. 2. Q= -1 then P and can be possibtive and PQ<1 or P can be negative ans PO>1. hence not suff.

combining 1 and 2.

if Q= -1 then P has to be 1 hence PQ <1 suff. answer should be C
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Imo C Taking value of P as 1 we will get 1 no matter the value of Q If Q=0 then p can take any value From statement 2 P can take any value making it both true and false This both are necessary