This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Horner’s syndrome involves all except 
Select and explain. 
A. Ptosis, B. Exopthalmos, C. Anhidrosis, D. Loss of cilio-spinal reflex
B: Exopthalmos
Answer: B: Exopthalmos 
Explanation: Horner’s syndrome is caused by damage to the sympathetic trunk.
The symptoms occur on the same side as the lesion of the sympathetic trunk.
It is characterized by


Miosis (a constricted pupil),
Ptosis (drooping of eyelids due to weakness of superior tarsal muscle which is a part of levator palpebrae superioris)
Apparent enophthalmos (ptosis due to weakness of orbicularis oculi makes it appear that the eyes are sunken in enophtalmos, exophthalmos doesn’t occur in Horner’s syndrome),
Anhidrosis (decreased sweating) and
Loss of cilio-spinal reflex (pinching nape of neck leads to pupillary dilation).