For his highly confidential project. Professor Mark Philip is trying to make a team comprising four doctors

For his highly confidential project. Professor Mark Philip is trying to make a team comprising four doctors: two males and two females.
He can choose the team members from among Peter, Jack, Martin, Steve, Mary, Rosy and Stephanie.

Peter, Jack, Martin and Steve are male doctors.
Mary, Rosy and Stephanie are female doctors.
Peter and Jack do not work together.
Rosy and Peter refuse to work together.
Martin and Stephanie cannot work together.

If Jack is made a member of the team, who among the following must be the other three members of the team?

  • Mary, Rosy and Peter
  • Mary, Stephanie and Martin
  • Mary, Stephanie and Peter
  • Mary, Rosy and Steve