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: Anatomy
3rd extensor compament of wrist contains tendon of ? 
Select and explain. 
A. ECRL, B. ECRB, C. EPL, D. EPB
C: EPL
Answer: C: EPL 
Explanation: Ans. C) EPL The third compament contains the extensor pollicis longus tendon, which originates at the mid-ulna and inses at the base of the first distal phalanx. In combination with the EPB tendon, it extends the thumb at the first carpometacarpal and first interphalangeal joints.