Match List I with List II and select the correct answer using the codes given below the Lists

(Substance) | (Physiological role)
I. Ptyalin | (A) Converts angioten-sinogen in blood into angiotensin
II. Pepsin | (B) Digests starch
III. Renin | (C) Digests proteins
IV. Oxytocin | (D) Hydrolyses fats
| (E) Induces contraction of smooth muscles

Here is the breakdown of the correct matches: 1. **Ptyalin** (also known as salivary amylase) is an enzyme in saliva that starts **digesting starch**. 2. **Pepsin** is a stomach enzyme that **digests proteins**. 3. **Renin** (spelled with one 'n') is an enzyme secreted by the kidneys that helps regulate blood pressure by **converting angiotensinogen into angiotensin**. 4. **Oxytocin** is a hormone that **induces contraction of smooth muscles**, specifically in the uterus during childbirth. Therefore, the correct sequence is I-B, II-C, III-A, IV-E.