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
Water hammer pulse is seen in- 
Select and explain. 
A. Aoic stenosis, B. Aoic regurgitation, C. Aoic stenosis and Aoic regurgitation, D. Mitral regurgitation
B: Aoic regurgitation
Answer: B: Aoic regurgitation 
Explanation: Answer is B (Aoic Regurgitation ): The Water hammer pulse or Corrigan's pulse is characterized by an abrupt and rapid carotid upstroke with a rapid fall off (collapsing pulse). It is characteristic of Aoic Regurgitation.