Question: In the parasympathetic system: 
 Options:  <1> The preganglionic neuron is in thoracic spinal cord. <2> Postganglionic neurons have short axons. <3> Postganglionic fibers release noradrenaline. <4> Postganglionic neurons have muscarinic receptors. <5> Numerous neurons innervate vascular smooth muscle of the extremities.
2