The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Absent thumb, radial deviation of wrist, bowing of forearm with thrombocytopenia which investigation need not to be done ?   (A) Echocardiography   (B) Bone marrow examination   (C) Platelet count   (D) Karyotyping
['(A) Echocardiography <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Echocardiography \n (B) Bone marrow examination \n (C) Platelet count \n (D) Karyotyping <> possible answers', '  Absent thumb, radial deviation of wrist, bowing of forearm with thrombocytopenia which investigation need not to be done ? <> context@']