Direction: A scientist is trying to find a cure for the common cold using four ingredients. He can choose from the stable chemicals A, B and C and the unstable chemicals W, X, Y and Z. In order for the formula not to explode, there must be two stable chemicals cannot be mixed because of their reaction together. Chemicals B cannot be mixed with chemicals W. Chemicals C cannot be mixed with chemicals Y. Chemicals Y cannot be mixed with chemicals Z.
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Which of the following can never be true?
I. If chemical C is used, chemical Z is added.
II. If chemical B is not used, chemical Y is added.
III. If chemical C is used, chemical W is
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- III only
- I and II only
- I, II and III
- II only
- III only
Correct Option: D
As per the given above question , we can say that
If B is not used and Y is added then W is selected and C is rejected respectively. Again problem appear in fulfill the no. stable of ingredients.
