91o
89o
37o
19o
Correct answer is C
In the diagram above, α = 54o(alternate angles; KL||MN) < KNM = 2α (LN is bisector of < KNM) = 108o
35o + < KMN + 108o = 180o(sum of angles of △)
< KMN + 143o = 180o
< KMN = 180o - 143o
= 37o
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