The magnitudes of principal stresses at a point are 250 MPa tensile and 150 MPa compressive. The magnitudes of the shearing stress on a plane on which the normal stress is 200 MPa tensile and the normal stress on a plane at right angle to this plane are

• A. 50√7 MPa and 100 MPa (tensile)
• B. 100 MPa and 100 MPa (compressive)
• C. 50√7 MPa and 100 MPa (compressive)
• D. 100 MPa and 50√7 MPa (tensile)