Read the following statements carefully.
P. I am extensively used in the healthcare industry, but my one disadvantage is that I am non-biodegradable.
Q. I am very familiar form of polyester and used for making bottles, utensils, films, wires, etc.
R. I am synthetic fibre, having wool-like feel and cheaper than wool.
S. I am thermosetting plastics and poor conductor of heat and electricity. P, Q, R, and S are respectively

Options

A. PET, rayon, petrochemical and plastics
B. Terylene, acrylic, rayon and melamine
C. PVC, PET, nylon, and Teflon
D. Plastic, PET, acrylic and bakelite

Explanation

To solve the question, we need to identify what each statement (P, Q, R, and S) refers to in terms of synthetic materials. Let's break down each statement step by step.

### Step 1: Analyze Statement P
- **Statement P**: "I am extensively used in the healthcare industry, but my one disadvantage is that I am non-biodegradable."
- **Analysis**: This statement suggests that the material is commonly used in medical applications but poses an environmental concern due to its non-biodegradability.
- **Conclusion**: The material referred to here is **Plastic**.

### Step 2: Analyze Statement Q
- **Statement Q**: "I am a very familiar form of polyester and used for making bottles, utensils, films, wires, etc."
- **Analysis**: This statement indicates that the material is a type of polyester widely used in everyday products.
- **Conclusion**: The material referred to here is **Polyethylene Terephthalate (PET)**.

### Step 3: Analyze Statement R
- **Statement R**: "I am a synthetic fibre, having a wool-like feel and cheaper than wool."
- **Analysis**: This statement describes a synthetic fiber that mimics the properties of wool but is more cost-effective.
- **Conclusion**: The material referred to here is **Acrylic**.

### Step 4: Analyze Statement S
- **Statement S**: "I am thermosetting plastics and poor conductor of heat and electricity."
- **Analysis**: This statement suggests that the material is a type of plastic that hardens permanently when heated and does not conduct heat or electricity well.
- **Conclusion**: The material referred to here is **Bakelite**.

### Final Answer
Putting it all together, we have:
- P: Plastic
- Q: Polyethylene Terephthalate (PET)
- R: Acrylic
- S: Bakelite

Thus, the correct order is:
**P, Q, R, S = Plastic, Polyethylene Terephthalate, Acrylic, Bakelite.**