This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
True about carpal tunnel syndrome -a) Occur in pregnancyb) Affects medial 3 1/2 fingerc) Associated with Hypothyroidismd) Froment sign positivee) Median nerve involvement is present 
Select and explain. 
A. ace, B. bde, C. cde, D. ade
A: ace
Answer: A: ace 
Explanation: Carpal tunnel syndrome can occur in pregnancy and hypothyroidism.
It affects lateral 3 and half fingers because median nerve supplied lateral 3 and half fingers.
Froment sign is seen in ulnar nerve injury.