P is processed in industries to get some useful products such as Q, R and S. S is obtained during the processing of P to get Q, R is a mixture of about 200 substances. Identify P, Q, R and S.

Options

A. P-Coal , Q-Coal tar , R-Coke , S-Coal gas
B. P-Coke , Q-Coal , R-Coal tar , S-Coal gas
C. P-Coal , Q-Coke , R-Coal tar , S-Coal gas
D. P-Coke , Q-Coal , R-Coal gas , S-Coal tar

Explanation

To solve the question, we need to identify the substances P, Q, R, and S based on the information provided. Let's break it down step by step.

### Step 1: Identify P
- **P** is described as being processed in industries to obtain useful products. The context suggests that P is a raw material that undergoes a specific process to yield other products.
- From the video transcript, it is mentioned that P is related to a process known as destructive distillation. The raw material commonly used in this process is **Coal**.
- Therefore, **P = Coal**.

### Step 2: Identify Q
- **Q** is one of the products obtained from processing P (Coal). The transcript states that during the processing of Coal, one of the main products we get is **Coke**.
- Hence, **Q = Coke**.

### Step 3: Identify R
- **R** is described as a mixture of about 200 substances. The video indicates that R is also derived from the processing of Coal.
- The byproducts of the destructive distillation of Coal include **Coal Tar**, which consists of numerous organic compounds (around 200 different substances).
- Thus, **R = Coal Tar**.

### Step 4: Identify S
- **S** is obtained during the processing of P to get Q. The transcript mentions that during the processing of Coal to produce Coke, we also obtain **Coal Gas**.
- Therefore, **S = Coal Gas**.

### Summary of Identifications
- **P = Coal**
- **Q = Coke**
- **R = Coal Tar**
- **S = Coal Gas**

### Final Answer
- P: Coal
- Q: Coke
- R: Coal Tar
- S: Coal Gas