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.
-
Which of the following combinations of chemicals is impossible?
I. Using chemical Y and W together.
II. Using chemical B and C together.
III. Using chemical W, X and Z together.
-
- III only
- I and II only
- I only
- II only
- III only
Correct Option: A
According to the given Option iii) said 3 unstable chemical so, there must be 1 stable, which is also impossible.
