Tsan synthesized

Options

A. insulin of dog
B. human insulin
C. cow insulin
D. sheep insulin

Answer

**Step-by-Step Solution:**

1. **Identify the Scientist**: The question refers to "Tsan," which is a misspelling of "Tsai" or "Tsan" as a scientist known for synthesizing insulin.

2. **Determine the Type of Insulin Synthesized**: The options provided are:
- Insulin of dog
- Human insulin
- Cow insulin
- Sheep insulin

Based on historical context, Tsan is known for synthesizing human insulin.

3. **Year of Synthesis**: The synthesis of human insulin by Tsan occurred in the year 1965.

4. **Understand the Medical Context**: Insulin is a hormone crucial for regulating blood sugar levels. A low production of insulin leads to diabetes, a condition characterized by high blood sugar levels.

5. **Conclusion**: The correct answer to the question is that Tsan synthesized human insulin.

**Final Answer**: The correct option is **human insulin** (Option 2).

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