Answer of this question is given D in solution section. They are claiming that d can be 2 / 3. But according to odd and even definition they must be an integer. So the answer should be B.

Please, correct me if I am wrong.

Does it say that D is specifically odd or even?

Yeah, they mentioned d is even

Where does it say that?

It says a \times b \times c \times d is even and positive

Oh sorry my mistake. got it. Thanks.

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