Question

The longest part of the alimentary canal is

• A. Oesophagus
• B. Large intestine
• C. Small intestine
• D. Stomach

Answer 1

The correct option is C Small intestine

• The alimentary canal includes the mouth, pharynx, oesophagus, stomach, small intestine, large intestine, and anus.
• The longest part of the alimentary canal is small intestine because it is the main organ of absorption and digestion of food.
  
• The surface area of the small intestine gets increased because of the presence of villi which gives food plenty of time to break down properly. Hence, the longest part of the alimentary canal is a small intestine.

So, the correct answer is 'Small intestine'.