Multiple Choice Question (MCQ)

Question: What is the rule for converting W.C.B to R.B, if a line lies in between 0 Degree and 90 Degree?
A. R.B = W.C.B
B. R.B = 180 Degree ? W.C.B
C. R.B = W.C.B ? 180 Degree
D. R.B = 360 Degree ? W.C.B
Correct Answer: R.B = W.C.B