Select the correct statements about snakes
A. Only four types of poisonous snakes are found in our country.
B. Cobra is a poisonous variety of snakes.
C. A poisonous snake has four hollow tooth (fangs) through which the poison enters the body of a person when the snake bites.
D. Medicine for snake bites is made from the snake's poison.

Options

A. C, D and A
B. B, A and C
C. A, B and D
D. B, C and D

Answer

To solve the question regarding the correct statements about snakes, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement A: "Only four types of poisonous snakes are found in our country."**
- This statement is **incorrect**. In India, there are more than 70 species of snakes, and while there are four well-known poisonous species (Cobra, Viper, Krait, and Ichis Coloratus), the statement implies that only four types exist, which is misleading.

2. **Statement B: "Cobra is a poisonous variety of snakes."**
- This statement is **correct**. The Cobra is indeed one of the well-known poisonous snakes found in India.

3. **Statement C: "A poisonous snake has four hollow tooth (fangs) through which the poison enters the body of a person when the snake bites."**
- This statement is **incorrect**. Poisonous snakes typically have **two** hollow fangs (not four) that are used to inject venom into their prey or in defense.

4. **Statement D: "Medicine for snake bites is made from the snake's poison."**
- This statement is **correct**. Antivenom is produced using the venom of snakes. Horses are often used in the process where they are injected with diluted snake venom to produce antibodies, which are then harvested to create antivenom.

### Conclusion:
Based on the analysis:
- **Correct Statements**: B and D
- **Incorrect Statements**: A and C

### Final Answer:
The correct statements about snakes are **B and D**.

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