Which of the elements having following positions, have same number of valence electrons as that of element with atomic number `6` ?
(i) Group `14` and period `5`
(ii) Group `14` and period `4`
(iii) Group `6` and period `4`
(iv) Group `14` and period `3`

Options

A. (i) and (ii) only
B. (i), (ii) and (iii) only
C. (i), (ii) and (iv) only
D. All of these

Explanation

To solve the question, we need to determine the number of valence electrons for the element with atomic number 6 and then compare it with the elements in the specified groups and periods.

### Step-by-Step Solution:

1. **Identify the Element with Atomic Number 6**:
- The element with atomic number 6 is Carbon (C).

2. **Determine the Valence Electrons of Carbon**:
- Carbon has the electronic configuration of 1s² 2s² 2p².
- The valence electrons are the electrons in the outermost shell, which for Carbon are 4 (2 from 2s and 2 from 2p).

3. **Check the Valence Electrons for Each Given Position**:
- **(i) Group 14 and Period 5**:
- The element in this position is Tin (Sn).
- Tin has the electronic configuration of [Kr] 5s² 4d¹⁰ 5p².
- Valence electrons = 4 (2 from 5s and 2 from 5p).

- **(ii) Group 14 and Period 4**:
- The element in this position is Silicon (Si).
- Silicon has the electronic configuration of [Ne] 3s² 3p².
- Valence electrons = 4 (2 from 3s and 2 from 3p).

- **(iii) Group 6 and Period 4**:
- The element in this position is Titanium (Ti).
- Titanium has the electronic configuration of [Ar] 4s² 3d².
- Valence electrons = 4 (2 from 4s and 2 from 3d).

- **(iv) Group 14 and Period 3**:
- The element in this position is Germanium (Ge).
- Germanium has the electronic configuration of [Ar] 4s² 3d¹⁰ 4p².
- Valence electrons = 4 (2 from 4s and 2 from 4p).

4. **Conclusion**:
- All the elements in the specified positions (i, ii, iii, and iv) have the same number of valence electrons as Carbon (4 valence electrons).

### Final Answer:
All of the elements in the given positions (i, ii, iii, and iv) have the same number of valence electrons as that of the element with atomic number 6 (Carbon).