Shelly states that the triangles below are similar. Which proportion supports her statement?

Triangle S T R. Side S T is 6, T R is 4, R S is 8. Triangle N M O. Side O N is 15, N M is 20, M O is 10.
StartFraction 8 Over 4 EndFraction = StartFraction 15 Over 10 EndFraction
StartFraction 8 Over 10 EndFraction = StartFraction 4 Over 20 EndFraction
StartFraction 6 Over 4 EndFraction = StartFraction 20 Over 10 EndFraction
StartFraction 8 Over 6 EndFraction = StartFraction 20 Over 15 EndFraction

The proportion that supports her statement is StartFraction 8 Over 4 EndFraction = StartFraction 15 Over 10 EndFraction.

The proportion that supports Shelly's statement that the triangles are similar is:

StartFraction 6 Over 4 EndFraction = StartFraction 20 Over 10 EndFraction