The pins in RJ-45 are numbered from 1 through 8. With the metal points of the plug facing toward you, pin 1 is the leftmost pin. Which two sets are looped on an RJ-45 T1 loopback plug?

A.	Pins 1 and 4
B.	Pins 1 and 7
C.	Pins 2 and 5
D.	Pins 2 and 8
E.	Pins 1 and 5
F.	Pins 2 and 7