The correct option is B Maximum principal stress theory
Maximum principal stress theory (Rankine theory) is suitable for brittle material.
Maximum principal strain theory (St. venants theory) is suitable for ductile and brittle material. Maximum shear stress theory is suitable for ductile material, especially in the case of shaft. Maximum strain energy theory is suitable for ductile material especially in the case of pressure vessel.
Maximum shear strain energy theory is suitable for ductile material and especially in the case of pure shear.