Read the given paragraph and select the correct option.
X is a man-made material. It is a necessary evil, as it has become an integral part of our lives but causes land pollution. An object made of X may take upto 400 years to decompose completely.
Which of the following options is incorrect regarding X ?

Options

A. The gases formed during burning X are highly poisonous.
B. The disposal of X objects down the drains can cause their clogging.
C. We should recycle bags made of X but they should not be used for keeping food.
D. X objects can recycled by a method involving redworms.

Explanation

To solve the question, we need to analyze the paragraph and the options provided regarding the man-made material referred to as "X."

### Step-by-Step Solution:

1. **Identify Material X**:
- The paragraph states that X is a man-made material that is integral to our lives but causes land pollution. It also mentions that it takes up to 400 years to decompose.
- Based on these characteristics, we can conclude that X refers to plastic.

2. **Understand the Properties of Plastic**:
- Plastic is indeed a non-biodegradable material, meaning it does not decompose naturally in the environment within a short period. It can take hundreds of years to break down.

3. **Evaluate the Options**:
- The question asks which option is incorrect regarding plastic (X). We need to analyze each option carefully.
- **Option 1**: "The gases formed during burning of X are highly poisonous."
- This is true; burning plastic releases toxic gases.
- **Option 2**: "The disposal of X objects down the drains can cause their clogging."
- This is also true; plastic waste can clog sewage systems.
- **Option 3**: "We should recycle bags made of X but they should not be used for keeping food."
- This is true; recycling is encouraged, and plastic bags are not safe for food storage.
- **Option 4**: "X can be recycled by methods involving redworms."
- This statement is incorrect. Plastic is non-biodegradable and cannot be recycled through microbial decomposition methods like those involving redworms, which are used for organic waste.

4. **Conclusion**:
- The incorrect option regarding X (plastic) is the one stating that it can be recycled by methods involving redworms.

### Final Answer:
The incorrect option regarding X is: "X can be recycled by methods involving redworms."