Pathology In a child with absent thumb, radial detion of wrist, bowing of forearm, which of the following investigation will not be useful? A Bone marrow examination B Karyotyping C Platelet count D 2D ECHO 💡 Explanation In a child with absent thumb, radial detion of wrist, bowing of forearm, which of the following investigation will not be useful? ✓ Correct Answer: B. Karyotyping