Biochemical laboratory of human body is

Options

A. stomach
B. liver
C. intestine
D. kidney

Explanation

### Step-by-Step Solution

1. **Understanding the Question**: The question asks for the "biochemical laboratory of the human body." This implies we need to identify an organ that plays a crucial role in biochemical processes.

2. **Identifying the Options**: The options provided are:
- A) Stomach
- B) Liver
- C) Intestine
- D) Kidney

3. **Analyzing Each Option**:
- **Stomach**: Primarily involved in the digestion of food but does not perform extensive biochemical functions.
- **Intestine**: Involved in the absorption of nutrients but does not carry out major biochemical processes.
- **Kidney**: Responsible for filtering blood and excreting waste but is not primarily a biochemical laboratory.
- **Liver**: Known for its extensive biochemical activities, including detoxification, drug metabolism, and bile secretion.

4. **Key Functions of the Liver**:
- **Detoxification**: The liver detoxifies harmful substances and chemicals in the body.
- **Drug Metabolism**: It metabolizes various medications and drugs, making them easier for the body to use or excrete.
- **Bile Secretion**: The liver produces bile, which is essential for the digestion and absorption of fats.
- **Nutrient Absorption**: It plays a role in the absorption of vitamins and fats.

5. **Conclusion**: Given the extensive biochemical functions performed by the liver, it is correctly identified as the "biochemical laboratory of the human body."

### Final Answer
The biochemical laboratory of the human body is the **liver**.

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