B. Neither the boys nor the girls are from our locality. I wonder where they are from.
This is the only one that make sense. The second sentence seals the deal. You would not wonder where they are from if you used the other choices.
Answer:
The actual answer is group III
Explanation:
Envy is a full word so it is always followed with "-able" except after 'i'.
A sudden, dramatic, and important discovery or development