a b c b c m n c m n r s - - - - -

A) m n a b c

B) m n c a b

C) m n r s t

D) m n r a b

Correct answer:
C) m n r s t

Description for Correct answer:
The series is a b c / b c m n /c m n r s / m n r s t


Please provide the error details in above question