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: Ophthalmology
Cause(s) of in Mydriasis: 
Select and explain. 
A. Organophosphorus poisoning, B. Homer syndrome, C. Oculomotor nerve palsy, D. Parasympathetic stimulation
C: Oculomotor nerve palsy
Answer: C: Oculomotor nerve palsy 
Explanation: Answer- C. Oculomotor nerve palsyCarbolic acid, Chloral hydrate, Organophosphorus, Morphine (opiate) and 'New Horn' i.e. neurosyphilis/tabes dorsalis (spinal miosis or small, irregular Argyll Robeson pupil) and Horner's syndrome, Oculomotor nerve palsy.Atropine and cocaine cause mydriasis.