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
Which of the following intrinsic muscles of hand link flexor to extensor tendons? 
Select and explain. 
A. Thenar muscles, B. Lumbricals, C. Palmar interossei, D. Dorsal interossei
B: Lumbricals
Answer: B: Lumbricals 
Explanation: Lumbricals originate from the tendon of flexor digitorum profundus in the palm and it is inseed in the lateral side of extensor digitorum profundus, thus it links flexor to extensor. The first and second lumbricals are supplied by the median nerve and the third and fouth are supplied by the ulnar nerve.