Which is the correct Lewis structure for fluorine, which is a group 7A element?
Choices are found in the link.

Answer: option A
Explanation:
Since Fluorine belongs to 7A group it should have 7 valency electrons in outer shell which is observed in option A.
But all options have 7 electrons in total. But we know that F has 3 unpaired and one odd electron separately which is coincide with option A hence it is the correct answer.