It's most likely static electricity, but since I barely have any information about this question, I can't help with a n extremely detailed explanation.
B) The comb and hair have become charged with opposite charges
Explanation:
When the comb was rubbed against dry hair, electrons moved from the hair to the comb. While the hair became positively charged, the comb became negatively charged by acquiring an excess static charge. In other words, the comb and hair have become charged with opposite charges.
