if LMC ~ BJK, then _____ ~ JB
a- LC
b-ML
c-CM
d-CL

The answer would be b- ML.
to do this you should look at the similarity statement and match up the letters in the correct order... if that makes sense?
Answer: [tex]\overlien{ML}[/tex]
Step-by-step explanation:
We know that the corresponding parts of two congruent triangles are congruent.
If [tex]\triangle{LMC}\cong\triangle{BJK}[/tex]
Then , [tex]\angle{L}\cong\angle{B}[/tex]
[tex]\angle{M}\cong\angle{J}[/tex] (1)
[tex]\angle{C}\cong\angle{K}[/tex] (2)
Then from (1) and (2) the side congruent to [tex]\overlien{JB}[/tex] is [tex]\overlien{ML}[/tex].