Can anyone share the test cases to solve this? The one I chose resulted in ABCD (which is not the answer btw)

Here’s my approach, but I’m not sure if it’s the best way -

I chose 1 positive set [2, 1, 1, 2] and 1 negative set [-2, 1, -3, 1] for a, b, c and d respectively.

It led me to choose A and D as the answer.

.

what if we choose [-1 , 1 , -2 , 1] for a,b,c,d

The problem with such questions is we have to either eliminate each answer individually using the constraint given or know the property of what happens when we apply inequality .

This would make A as false

Noted!

Thanks much

Yup! The answer is D.

I guess, we need to check at least 3 values to make sure the answer is right.