Answer is C, continents were once all joined together
B.5 as the electronic configuration is 2.5. 2 on the first shell abd 5 on the valency or most outer sgell.
For A:
Your longest carbon chain is 5 so it's overall a pentane
you have 2 branchings on Carbon 2 and 4; and the branchings are methyl groups
so the name would be 2,3-dimethylpentane
Give me a little on B: It's giving me some trouble
False because they both have different properties