Read the given information carefully and answer the question that follows.

Five coaching classes P, Q, R, S and T are located on five different floors 1, 2, 3, 4 and 5, not necessarily in the same order. Only one subject out of Physics, Chemistry, Mathematics, Biology and English, is taught in each coaching class, but not necessarily in the same order.

The following information is also known:

• Biology is taught in coaching class S, while English is not taught in coaching class Q.

• Coaching class R is on the 3rd floor, and Chemistry is taught in coaching class P.

• Physics is taught in the coaching class on the 5th floor.

• The coaching class on the 3rd floor does not teach either English or Physics.

On the basis of the information given, identify the floor on which Mathematics is taught.

Given: 

Mathematics taught on 3rd floor.

Thus, correct option is (b).