I think you forgot to attach the picture of the diagram along with the question. I am answering the question based on my research and knowledge.There are several information[s already given in the question.
Length of AB = 5 meters
Length of AC = 16 meters
Then
tangent = opposite/adjacent
tan ^-1 (5/16) = 17.3
= 17
From the above deduction, it can be easily concluded that the correct option among all the options that are given in the question is the second option.