How many pairs of wires are used in an RJ-45 connector?

A.
2

B.
3

C.
4

D.
5

Explanation:
An RJ-45 connector is used on UTP cable which consists of 4 pairs of twisted wires.
References:
David Groth and Dan Newland, A+ Complete Study Guide (2nd Edition), Sybex, Alameda CA,

2002, pp. 325-327.