The number of muscle fibers innervated by a motor axon is smallest in: (A) Gastrocnemius, (B) Orbicularis oculi, (C) Single unit smooth muscle, (D) Soleus
Answer is B. The extraocular and hand muscles have an innervations ratio of 3 to 6 whereas gastrocnemius and back muscle has a ratio of 2000.(Refer Medical Physiology by Guyton & Hall, 12th edition, page no: 96)