Multiple Choice Question (MCQ)

Question: What is the method used for the instrument is suspected with improper adjustments and the error is doubled or reversal of telescope?
A. Prolonging a line by 1st method
B. Prolonging a line by 2nd method
C. Prolonging a line by 3rd method
D. Prolonging a line by 4th method
Correct Answer: Prolonging a line by 3rd method