1.  This term is given as one of the alternatives given below each question. Find out this term.
Dda : ADD : : Rrb : ?

A. BBr
B. bRR
C. RRR
D. BrR

Answer: Option B

Explanation:

The first and third letters of the first group are respectively moved one and two steps forward while the second letter is moved one step backward to obtain the corresponding letters of the second group.