Which of the following statement are CORRECT?
I. Renin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins.
II. No significant digestive activity occurs in the large intestine.
III. The egestion of faeces to the outside through the anal opening ( defecation ) is a voluntary process and is carried out by a mass peristaltic movement.
IV. Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting center in the medulla.
(a) I, II and IV
(b) II, III and IV
(c) III and IV
(d) II and III

Options

A. I, II and IV
B. II, III and IV
C. III and IV
D. II and III

Answer

To solve the question, we need to evaluate each of the statements provided and determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate Statement I**:
- Statement: "Renin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins."
- Analysis: Renin is indeed an enzyme, but it is not a proteolytic enzyme and is not found in gastric juice. Instead, it is secreted by the kidneys and is involved in blood pressure regulation. Therefore, this statement is **incorrect**.

2. **Evaluate Statement II**:
- Statement: "No significant digestive activity occurs in the large intestine."
- Analysis: The large intestine primarily functions in the absorption of water and electrolytes, and while it does not carry out significant digestive activity like the small intestine, it is involved in the absorption process. Thus, this statement is **correct**.

3. **Evaluate Statement III**:
- Statement: "The egestion of faeces to the outside through the anal opening (defecation) is a voluntary process and is carried out by a mass peristaltic movement."
- Analysis: Defecation is indeed a voluntary process, and it involves peristaltic movements to push the feces out of the body. Therefore, this statement is **correct**.

4. **Evaluate Statement IV**:
- Statement: "Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting center in the medulla."
- Analysis: The vomiting center in the medulla does control the reflex action of vomiting, which is the ejection of stomach contents through the mouth. Therefore, this statement is **correct**.

### Conclusion:
Based on the evaluations:
- Statement I: Incorrect
- Statement II: Correct
- Statement III: Correct
- Statement IV: Correct

The correct statements are II, III, and IV. Therefore, the answer is **(b) II, III and IV**.