Read the following four statements (A - D ) :
A. The small intestine is the principle organ for the absorption of nutrients.
B. In constipation , the faeces are retained within the rectum as the bowel movements occur irregularly.
C. The gross calorific value of fat is 4.1 kcal/g.
D. The innermost layer lining the lumen of the alimentary canal is the serosa.
How many of the above statement are wrong?
(a) Four
(b) Three
(c) Two
(d) One

Options

A. Four
B. Three
C. Two
D. One

Answer

To determine how many statements are wrong among the four given statements (A - D), we will analyze each statement one by one.

### Step 1: Analyze Statement A
**Statement A:** The small intestine is the principal organ for the absorption of nutrients.

- **Analysis:** This statement is true. The small intestine is indeed the main site for the absorption of nutrients in the alimentary canal. It absorbs carbohydrates, proteins, fats, vitamins, and minerals.

### Step 2: Analyze Statement B
**Statement B:** In constipation, the feces are retained within the rectum as the bowel movements occur irregularly.

- **Analysis:** This statement is also true. Constipation is characterized by infrequent bowel movements and the retention of feces in the rectum, often due to factors like poor diet and dehydration.

### Step 3: Analyze Statement C
**Statement C:** The gross calorific value of fat is 4.1 kcal/g.

- **Analysis:** This statement is false. The calorific value of fat is approximately 9.45 kcal/g, while 4.1 kcal/g is the calorific value for carbohydrates. Therefore, this statement is incorrect.

### Step 4: Analyze Statement D
**Statement D:** The innermost layer lining the lumen of the alimentary canal is the serosa.

- **Analysis:** This statement is also false. The innermost layer of the alimentary canal is the mucosa, not the serosa. The serosa is the outermost layer. Therefore, this statement is incorrect.

### Conclusion
- **Correct Statements:** A and B (2 statements)
- **Incorrect Statements:** C and D (2 statements)

Thus, the total number of wrong statements is **2**.

### Final Answer
(c) Two

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