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
An 18-year-old male presented with acute onset a history of blurring of vision for the same duration on examination, the patient has quadriparesis with areflexia. Both the pupils are non-reactive.The most probable diagnosis is - 
Select and explain. 
A. Poliomyelitis, B. Botulism, C. Diphtheria, D. Porphyria
B: Botulism
Answer: B: Botulism 
Explanation: Ans. b. Botulism