The preganglionic neurons of the sacral parasympathetic division are formed by which of the following structures?
a. Otic nucleus
b. Pelvic splanchnic nerves
c. Ciliary ganglion
d. Submandibular ganglion
a. Otic nucleus
b. Pelvic splanchnic nerves
c. Ciliary ganglion
d. Submandibular ganglion