P. On the other hand, it has been reported that psychotic rarely yawn,
Q. Yawning or its absence has been related to various clinical conditions.
R. Interestingly, some clinicians claim that those with acute physical illness don’t yawn until they are on the road to recovery.
S. It can be a symptom of brain lesions, hemorrhage, motion sickness and encephalitis.
Right Answer is: C
Sentence Q is our introductory sentence as it introduces the topic – Yawning and the clinical conditions related to it. Sentence S will follow sentence Q as it further mentions the various clinical conditions associated with yawning. The only option that has sequence QS together is option C. Hence, it is the answer.