Important steps for obtaining of metals from their ores are given below:
(i) Processing
(ii) Sanding and Grinding
(iii) Enrichment
(iv) Extraction

Options

A. (ii), (iii), (i), (iv)
B. (ii), (iii), (iv), (i)
C. (ii), (iv), (iii), (i)
D. (ii), (i), (iv), (iii)

Explanation

To obtain metals from their ores, we follow a series of important steps. Here’s a step-by-step solution to arrange the given steps in the correct order:

### Step-by-Step Solution:

1. **Sanding and Grinding**: The first step in the process is to break down the ore into smaller pieces. This is done through crushing and grinding, which makes it easier to handle and process the ore. This step is crucial as it prepares the ore for further processing.

2. **Enrichment**: After the ore has been ground into fine particles, the next step is enrichment. This involves separating the valuable minerals from the waste material (gangue) in the ore. The goal is to increase the concentration of the desired metal in the ore.

3. **Extraction**: Once we have enriched the ore, the next step is extraction. This involves using chemical processes such as reduction, roasting, or other methods to separate the metal from the ore. This step is where the actual metal is obtained from the enriched ore.

4. **Processing**: The final step is processing, which involves refining and purifying the extracted metal to make it suitable for use. This may include further chemical treatments, melting, and shaping the metal into its final form.

### Final Order of Steps:
- (ii) Sanding and Grinding
- (iii) Enrichment
- (iv) Extraction
- (i) Processing