M, N, O, P, Q, R and S are employees of a company. Each of them works in his own cabin numbered 1 to 7, but not necessarily in the same order. Each of them wears a shirt of different colours – Blue, Green , Yellow, Sky Blue, Purple, Red and Pink but not necessarily in the same order.

N sits in cabin 4 but he does not wear either purple or sky blue shirt. O wears Blue shirt but he does not sit in cabin 2 or 6. Q sits in cabin 5 and he wears a Red shirt. The one who wears a Green shirt sits in cabin 7, P sits in cabin 1. S wears a Pink shirt. M does not sit in cabin 7. The one who wears Sky blue shirt sits in cabin 2.Either M or R does not sit in cabin 6.

Which of the following is true?