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: Surgery
Which of the following mode of treatment for achalasia is associated with high rate of recurrence? 
Select and explain. 
A. Pneumatic dilatation, B. Laproscopic myotomy, C. Open surgical myotomy, D. Botullin toxin
D: Botullin toxin
Answer: D: Botullin toxin 
Explanation: Botulinum toxin, injected into the lower esophageal sphincter under endoscopic guidance, inhibits acetylcholine release from nerve endings and improves dysphagia in about 66% of cases of achalasia for at least 6 months. This technique is useful only for temporary relief of symptoms, thus associated with high rate of recurrence. Ref: Harrison's Internal Medicine, 18th Edition, Chapter 292