Question

A: Aptyalism patients have higher than
incidences of dental caries.
"R: Aptyalism is caused by the a
parasympathetic nervous system.​

Answer 1

if

Ptyalism (excess secretion of saliva) is stimulated by the action of PNS and the SNS. The patients with this disorders have higher than normal incidences of dental caries.

Hence, the correct option is (2), i.e., both assertion and reason are true but the reason is not the correct explanation of the assertion.