statement 1 is (A-C-B) is even, rephrased as -(A+B+C) is even. Thus sufficient

Statement 2

(A-C)/B is even

two options

1. (A-C) is even, B is even thus (A-C)/B is even

2. (A-C) is even, B is odd thus (A-C)/B is odd

Thus, (A-C) is even always, which is possible under 2 options

1. both A and C are even, even+/- even = even

2. both A and C are odd, odd+/- odd = odd

Thus, as per statement 2 A,B or C can either be odd or even.

So statement 2 is insufficient.

Ans:A

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