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
A most common cause of intestinal obstruction is? 
Select and explain. 
A. Ileocaecal tuberculosis, B. Carcinoma colon, C. Intussusception, D. Adhesions
D: Adhesions
Answer: D: Adhesions 
Explanation: Adhesions and bands are the commonest causes of intestinal obstruction in Western countries. In India, hernia and then adhesions are the two common causes of intestinal obstruction. Clinical features

Pain abdomen—colicky type and recurrent and episodic
Distension, vomiting
Constipation
Reduced bowel sounds on auscultation
Previous surgical scars commonly observed
Dehydration, tachycardia, hypotension.