<prompt> Consider the following modalities of treatment 1. Balloon dilatation 2. Heller;s operation 3. Local injection of botulinum toxin Which of the above isare the treatment modalities for achalasia cardia?1 only1 and 2 only2 and 3 only1, 2 and 3  <response>: Davidson;s principles and practice of medicine 22nd edition. endoscopically directed injection of botulinum toxin into the lower oesophageal sphincter induces clinical remission but relapse is common. Surgical myotomy or Heller;s operation performed eitheeither laproscopically or as an open operation is effective. Balloon catheter dialatatin improves symptoms in 80 cases 