What is a key difference between IPv$4$ and IPv$6$ in terms of address notation?

Question $25$ options:

IPv$4$ uses hexadecimal notation, while IPv$6$ uses dotted$-$decimal notation

IPv$4$ addresses include a flow label, whereas IPv$6$ addresses do not

IPv$6$ addresses are typically written in hexadecimal form, while IPv$4$ uses dotted$-$decimal notation

IPv$6$ eliminates the need for subnet masks, unlike IPv$4$

IPv$6$ uses $32-$bit addresses, while IPv$4$ uses $128-$bit addresses

IPv$4$ addresses are longer and more complex than IPv$6$ addresses