​Six friends M, N, O, P, Q and R have their tests on a different day of week starting from Monday and ending on Saturday of the same week. Only two friends are having their tests before M’s test. Only four friends are having their tests after Q‘s test. Only O has the test between the tests of P and N. Who amongst the following has the test on Monday?​

·       Six friends M, N, O, P, Q and R have their tests on a different day of week starting from Monday and ending on Saturday of the same week.

·       Only two friends are having their tests before M’s test.

·       Only four friends are having their tests after Q‘s test.

·       Only O has the test between the tests of P and N.

So, R has the test on Monday.

Thus, correct option is (a).