In the diagram given below, the circle represents Professors in a Medical College, the triangle stands for Surgical Specialists while the rectangle represents the Medical Specialists:
Professors in a Medical College = A,D,X,Y
Surgical Specialists = C,D,Y,Z
Medical Specialists = B,X,Y,Z
Professors who are Medical specialists = X and Y.
So either of the options A and B are correct.
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