Which of the Following Statements Accurately Describes the Locations of Muscarinic

Which of the following statements accurately describes the locations of muscarinic and nicotinic receptors?​ 

A) Muscarinic and nicotinic receptors are found in both the central and peripheral nervous systems. 
B) Muscarinic receptors are found in the central nervous system only, whereas nicotinic receptors are found in the peripheral nervous system only. 
C) Nicotinic receptors are found in both the central and peripheral nervous systems, whereas muscarinic receptors are found in the central nervous system only. 
D) Muscarinic receptors are found in both the central and peripheral nervous systems, whereas nicotinic receptors are found in the central nervous system only.