Correct order of size is :-

Options

A. `F gt C gt Br gt Ge `
B. `Ge gt C gt F gt Br`
C. `Ge gt Br gt C gt F`
D. `Ge gt C gt Br gt F`

Explanation

To determine the correct order of size for the elements fluorine (F), carbon (C), bromine (Br), and germanium (Ge), we need to analyze their positions in the periodic table and apply the general trends in atomic size.

### Step-by-Step Solution:

1. **Identify the Elements and Their Positions:**
- Locate the elements on the periodic table:
- Carbon (C) is in Group 14, Period 2.
- Fluorine (F) is in Group 17, Period 2.
- Bromine (Br) is in Group 17, Period 4.
- Germanium (Ge) is in Group 14, Period 4.

2. **Understand the Trends in Atomic Size:**
- Atomic size decreases from left to right across a period due to increasing nuclear charge, which pulls the electrons closer to the nucleus.
- Atomic size increases down a group due to the addition of electron shells.

3. **Compare Sizes of Elements:**
- **Fluorine vs. Bromine:**
- Fluorine is smaller than bromine because bromine is in a lower period (Period 4) compared to fluorine (Period 2).
- **Carbon vs. Germanium:**
- Carbon is smaller than germanium for the same reason; germanium is in Period 4 while carbon is in Period 2.

4. **Establish the Size Order:**
- From the trends established:
- Germanium (Ge) > Bromine (Br) > Carbon (C) > Fluorine (F)
- Therefore, the correct order of size from largest to smallest is:
- Ge > Br > C > F

5. **Final Answer:**
- The correct order of size is: **Germanium (Ge) > Bromine (Br) > Carbon (C) > Fluorine (F)**.