The correct answer is B. Small intestine.
The small intestine is the longest part of the digestive system, measuring about 20 feet long. It is located between the stomach and the large intestine. The small intestine is responsible for absorbing nutrients from food. It does this by secreting digestive enzymes and bile, which break down food into smaller molecules that can be absorbed by the bloodstream.
The pancreas is a gland located behind the stomach. It produces digestive enzymes and hormones that are released into the small intestine. The pancreas helps to break down carbohydrates, proteins, and fats.
The large intestine is the final part of the digestive system. It is about 5 feet long and is located between the small intestine and the anus. The large intestine absorbs water and electrolytes from food, and it stores waste products until they are eliminated from the body.
The stomach is a muscular sac located in the upper abdomen. It is responsible for storing food and breaking it down into smaller pieces. The stomach also produces gastric juices, which help to kill bacteria and break down food.
Therefore, the small intestine is the part of the alimentary canal of man where most of the digestion occurs.