Who amongst the following

In a group of six persons – M, N, O, X, Y and Z there are two married couples. Each of them belongs to different states, viz. UP, MP, West Bengal, Gujarat, Haryana and Karnataka, but not necessarily in the same order. Each person is engaged in different professions viz. Artist, Tailor, Engineer, Carpenter, Professor and Principal. No lady is Professor or Engineer. Husband of O is Professor and he belongs to the state of MP. Y is the native of Karnataka and is an Artist while Z is Carpenter. Both the Artist and the Carpenter are males. M, the husband of the Tailor, is a Professor and his wife belongs to the state of Haryana. The lady principal belongs to the state of Gujarat and she is the wife of X who belongs to the state of UP

Question: Who amongst the following is a native of West Bengal?
Question: Who amongst the is the Principal?

Question: Which of the following pair represents the unmarried members?