Arrange the following steps in a sequence for the manufacture of cement.
(1) Mixture is pulverised using a pulveriser.
(2) Limestone and clay are mixed in a definite proportion.
(3) Mixture is heated to 1500°C to 1600°C to form clinkers.
(4) Clinkers are pulverised to form fine powder and a small quantity of gypsum is added.

Options

A. 1 3 2 4
B. 2 1 3 4
C. 2 4 3 1
D. 4 3 2 1

Explanation

To arrange the steps for the manufacture of cement in the correct sequence, we will analyze each step provided and determine the logical order in which they occur.

### Step-by-Step Solution:

1. **Step 2**: **Limestone and clay are mixed in a definite proportion.**
- This is the first step in the cement manufacturing process. The raw materials, limestone (calcium carbonate) and clay, need to be combined in specific ratios to ensure the correct chemical composition for cement.

2. **Step 1**: **Mixture is pulverised using a pulveriser.**
- After mixing, the next step is to pulverize the mixture. This process involves grinding the mixture into a fine powder to increase the surface area for the subsequent heating process.

3. **Step 3**: **Mixture is heated to 1500°C to 1600°C to form clinkers.**
- The pulverized mixture is then heated in a kiln at high temperatures (between 1500°C to 1600°C). This heating process causes the raw materials to undergo chemical reactions, resulting in the formation of clinkers.

4. **Step 4**: **Clinkers are pulverised to form fine powder and a small quantity of gypsum is added.**
- Finally, the clinkers are cooled and then pulverized again to create a fine powder. During this process, a small amount of gypsum is added to control the setting time of the cement.

### Final Sequence:
The correct sequence of steps for the manufacture of cement is:
**2 → 1 → 3 → 4**