If ΔEFG ~ ΔLMN with a ratio of 2:1, which of the following is true?

segment EF over segment LM equals segment FG over segment MN
segment EF is congruent to segment LM
segment EF over segment LM equals segment EG over segment LM
segment EG is congruent to segment LM

The first option is true: segment EF over segment LM equals segment FG over segment MN.