Which of the following analcogies is correct .

Options

A. Group 16 elements chalcogens :: group 17 elements halogens
B. `XeO_(3)`: Pyramidal :: `SeO_(2)`: Linear
C. Dioxygen : Metallurgical opeations : : Dinitrogen : refrigeration
D. Ozone : bleaching agent :: Nitric acid : Oxidising agent

Explanation

To determine which of the provided analogies is correct, we need to analyze the terms used for the elements in groups 16 and 17 of the periodic table.

### Step-by-Step Solution:

1. **Identify Group 16 Elements:**
- Group 16 elements in the periodic table include oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po).
- These elements are commonly referred to as "chalcogens."

2. **Identify Group 17 Elements:**
- Group 17 elements include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
- These elements are known as "halogens."

3. **Analyze the Analogies:**
- **First Analogy:** Group 16 elements are called chalcogens, and group 17 elements are called halogens.
- This statement is correct.
- **Second Analogy:** Group 16 elements are called pyramids, and group 17 elements are called chalcogens.
- This statement is incorrect; group 16 elements are not called pyramids.
- **Third Analogy:** Group 16 elements are called chalcogens.
- This statement is correct but incomplete as it does not mention group 17.
- **Fourth Analogy:** Group 16 elements are called chalcogens.
- This statement is also correct but again incomplete.

4. **Conclusion:**
- The only fully correct analogy is the first one: Group 16 elements are called chalcogens, and group 17 elements are called halogens.

### Final Answer:
The correct analogy is: Group 16 elements are called chalcogens, and group 17 elements are called halogens.

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