Alcohol and _____ are the examples of combustible substances.

Options

A. Coal
B. Sand
C. Water
D. Glass

Answer

To solve the question "Alcohol and _____ are the examples of combustible substances," we will follow these steps:

### Step 1: Understand the Definition of Combustible Substances
Combustible substances are materials that can burn in the presence of oxygen to produce heat and light.

**Hint:** Remember that combustible substances are those that can undergo combustion.

### Step 2: Identify Examples of Combustible Substances
From our knowledge, we know that alcohol is a combustible substance. We need to find another example that fits this category.

**Hint:** Think of common materials that are known to burn easily.

### Step 3: Recall Common Combustible Substances
Some common examples of combustible substances include wood, coal, gasoline, and paper.

**Hint:** Consider substances that are commonly used as fuels.

### Step 4: Select the Appropriate Example
Among the examples listed, coal is a well-known combustible substance that burns in air and produces heat and light.

**Hint:** Look for a substance that is often used in heating or energy production.

### Step 5: Write the Complete Answer
Thus, the complete answer to the question is: "Alcohol and coal are the examples of combustible substances."

**Final Answer:** Alcohol and coal are the examples of combustible substances.