A combines with B to form C and D. A and D are major contributors to global warming and both are carbon compounds. B is a supporter of combustion. Magnesium burns in the presence of B with a dazzling white flame and forms a product X which is basic in nature. With C, X forms a compound which turns red litmus paper blue. Give the respective chemical reactions involved.

Explanation

To solve the problem step by step, let's break down the information provided and identify the chemical reactions involved.

### Step 1: Identify the components A, B, C, and D
- **A** is a carbon compound that contributes to global warming. It can be identified as **methane (CH₄)**.
- **B** is a supporter of combustion, which is **oxygen (O₂)**.
- **C** is a product formed when A combines with B, which is **carbon dioxide (CO₂)**.
- **D** is another carbon compound contributing to global warming, which is **carbon dioxide (CO₂)**.

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