Which of the following combination of elements belong to the same group?

Options

A. N, P, As
B. Li, Be, Al
C. Na, Mg, Al
D. O, S, Cl

Explanation

To determine which combination of elements belongs to the same group in the periodic table, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Groups in the Periodic Table**:
- Elements in the periodic table are arranged in vertical columns known as groups. Elements in the same group typically have similar chemical properties due to having the same number of valence electrons.

2. **Identifying the Given Elements**:
- The elements mentioned in the question are nitrogen, phosphorus, arsenic, oxygen, sulfur, and chlorine.

3. **Checking the Group of Each Element**:
- **Nitrogen (N)**: Atomic number 7, belongs to Group 15 (or Group V).
- **Phosphorus (P)**: Atomic number 15, also belongs to Group 15 (or Group V).
- **Arsenic (As)**: Atomic number 33, again belongs to Group 15 (or Group V).
- **Oxygen (O)**: Atomic number 8, belongs to Group 16 (or Group VI).
- **Sulfur (S)**: Atomic number 16, also belongs to Group 16 (or Group VI).
- **Chlorine (Cl)**: Atomic number 17, belongs to Group 17 (or Group VII).

4. **Grouping the Elements**:
- From the analysis, nitrogen, phosphorus, and arsenic are all in Group 15.
- Oxygen and sulfur are in Group 16.
- Chlorine is in Group 17.

5. **Conclusion**:
- The combination of elements that belong to the same group is nitrogen, phosphorus, and arsenic (Group 15).

### Final Answer:
The combination of elements that belong to the same group is **nitrogen, phosphorus, and arsenic**.

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