In the following flowchart about protein digestion , P, Q ,R and S enzymes.
`"Proteins"overset(P)to " Proteoses and Peptones " overset(Q)to " Polypeptides" overset(R)to "Dipetides"overset(S)to " Amino acids "`
The correct information of enzymes P, Q,R and S is

Options

A. P : produced by Intestine as a proenzyme stage and is activated at alkaline pH
Q : produced by pancreas as acts a proenzyme and is activated by an intestinal enzyme
R : produced by stomach as a proenzyme stage and is activated at acidic pH
S : produced by pancreas in a active state
B. P : produced by stomach as a proenzyme stage and is activated by an intestinal at acidic pH
Q : produced by pancreas as acts a proenzyme and is activated by an intestinal enzyme
R : produced by pancreas in a active state
S : produced by intestine in an active state
C. P :produced by stomach as a proenzyme stage and is activated at acidic pH
Q :produced by pancreas as acts a proenzyme and is activated by an intestinal enzyme
R : produced by intestine in an active state
S : produced by intestine in an active state
D. P : produced by stomach as a proenzyme stage amd is activated at acidic enzyme
Q: produced by pancreas as a proenzyme and is activated by an intestinal enzyme
R : produced by intestine as a proenzyme and is activated Q
S : produced by intestine in an active state

Answer

To solve the question regarding the enzymes involved in protein digestion, we will analyze each step of the flowchart and identify the correct enzymes P, Q, R, and S.

### Step-by-Step Solution:

1. **Identify Enzyme P**:
- The digestion of proteins begins in the stomach. The main enzyme responsible for this process is **pepsin**. Pepsin is secreted as an inactive form called **pepsinogen** by the gastric glands and is activated in the acidic environment of the stomach (pH ≈ 2).
- Thus, **P is Pepsin**.

2. **Identify Enzyme Q**:
- After proteins are broken down into proteoses and peptones by pepsin, these products are further digested in the small intestine. The pancreatic juice contains several enzymes, including **trypsin**, which acts on proteoses and peptones to convert them into polypeptides.
- Therefore, **Q is Trypsin**.

3. **Identify Enzyme R**:
- Polypeptides are further broken down into smaller units called dipeptides. This process is facilitated by enzymes known as **dipeptidases**.
- Hence, **R is Dipeptidase**.

4. **Identify Enzyme S**:
- Finally, dipeptides are broken down into amino acids by the enzyme **aminopeptidase**, which acts on the terminal end of the dipeptides.
- Thus, **S is Aminopeptidase**.

### Summary of Enzymes:
- **P: Pepsin**
- **Q: Trypsin**
- **R: Dipeptidase**
- **S: Aminopeptidase**

### Final Answer:
The correct information of enzymes P, Q, R, and S is:
- P: Pepsin
- Q: Trypsin
- R: Dipeptidase
- S: Aminopeptidase