is the answer Methionine, plz help

You will now determine the primary structure of this auxiliary protein, which you named helicase. Take into account the information given below.

You try to dansylate helicase by treatment with dansyl chloride. You perform amino acid hydrolysis, and the only fluorescent products are 12 equivalents of monodansyl-Lys and 1 equivalent of dansyl-Met.

Which amino acid is found at the N-terminus of helicase?

Group of answer choices

a-Lysine

b-Leucine

c-Methionine