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
The structure that lies lateral to distal radial tubercle is ? 
Select and explain. 
A. Extensor pollicis longus, B. Extensor carpi radialis longus, C. Brachoradialis, D. Extensor carpi ulnaris
B: Extensor carpi radialis longus
Answer: B: Extensor carpi radialis longus 
Explanation: Ans. is 'b' i.e., Extensor carpi radialis longus Dorum of lower end of radius has dorsal tubercle of radius (Lister's tubercle), which can be palpated in the line with the cleft between the index and middle fingers.The groove medial to Lister's tubercle is traversed by tendon of extensor pollicis longus.The groove lateral to Lister's tubercle is traversed by tendons of extensor carpi radialis longus (ECRL) and extensor carpi radialis brevis (ECRB).