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
Examination of a patient revealed ipsilateral third nerve paresis and cerebellar ataxia. What is the MOST likely diagnosis? 
Select and explain. 
A. Weber's syndrome, B. Claude's syndrome, C. Benedikt's syndrome, D. Nothnagel's syndrome
D: Nothnagel's syndrome
Answer: D: Nothnagel's syndrome 
Explanation: In Nothnagel's syndrome the area of lesion is superior cerebellar peduncle. These patients presents with ipsilateral third nerve paresis and cerebellar ataxia. In Benedict's syndrome the lesion is in the area of red nucleus. Patients presents with contralateral hemitremor with ipsilateral third nerve paresis. Claude's syndrome has features of both Nothnagel's and Benedict's syndrome. In Weber's syndrome the lesion is in the coicospinal tract. This leads to ipsilateral third nerve paresis with contralateral hemiparesis. Ref: Textbook of Ophthalmology edited by Sunita Agarwa page 333.