Catalytic converters, which are fitted into automobiles for reducing the emission of poisonous gases possess which of the following metals as catalyst ?

Options

A. Platinum-Palldium
B. Rhodium
C. Lead
D. Both (a) and (b)

Explanation

To solve the question about which metals are used as catalysts in catalytic converters fitted into automobiles, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Purpose of Catalytic Converters**:
- Catalytic converters are devices used in automobiles to reduce the emission of harmful gases from the exhaust. They help in converting toxic gases into less harmful substances.

2. **Identify the Catalysts Used**:
- The main catalysts used in catalytic converters are precious metals due to their effectiveness in facilitating chemical reactions without being consumed in the process.

3. **List the Metals**:
- The metals commonly used as catalysts in catalytic converters include:
- Platinum (Pt)
- Palladium (Pd)
- Rhodium (Rh)

4. **Analyze the Options Provided**:
- The question provides several options:
- A) Platinum
- B) Palladium
- C) Rhodium
- D) Lead
- E) Both A and B

5. **Determine the Correct Answer**:
- Since platinum, palladium, and rhodium are all used as catalysts in catalytic converters, the correct answer includes options A, B, and C. However, the closest option that includes the relevant metals is "both A and B" (which implies platinum and palladium).

6. **Final Answer**:
- Therefore, the most accurate answer based on the options provided is **both A and B** (which refers to platinum and palladium).