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Repeated USMLE Questions Step 1- 331

Q- Which one of the following conditions most likely occurs during normal delivery when the shoulders of the baby are impacted behind the maternal bony pelvis?

A- Frozen shoulder

B- Rotator cuff tear

C- Shoulder dystocia

D- Tendinitis

C- Shoulder dystocia



Q- Which one of the following nerves would be likely affected if a stab injury is established to the lower brachial plexus (C8-T1)?

A- Axillary nerve

B- Musculocutaneous nerve

C- Radial nerve

D- Ulnar nerve

D- Ulnar nerve



Q- Megaloblastic anemia is caused by folic acid or Vitamin B12 deficiency. Which of these reactions is directly affected by vitamin B12 deficiency?

A- Malonyl CoA >>  palmitate

B- Methylmalonyl CoA  >> succinyl CoA

C- Propionyl CoA >>  methylmalonyl CoA

D- Succinyl CoA >> fumarate

B- Methylmalonyl CoA  >> succinyl CoA



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