What is dengue?

I- Dengue is an infectious disease caused by a virus.
II- The virus that causes dengue belongs to the flavivirus genus.
III- Dengue is transmitted by mosquitoes, mainly by Aedes aegypti.
IV- There is only one type of dengue virus.
V- Dengue can cause flu-like symptoms and, in some cases, evolve into a potentially fatal condition called severe dengue or dengue hemorrhagic fever.
a) I, II, III, and V are correct.
b) I, II, and III are correct.
c) I, II, III, IV, and V are correct.
d) Only IV is incorrect.