DDA : ADD :: RRB : ?

Options

A. RBR
B. BRB
C. BRR
D. RBB

Explanation

To solve the analogy DDA : ADD :: RRB : ?, we need to identify the pattern in the first pair (DDA and ADD) and then apply the same pattern to the second pair (RRB).

### Step-by-Step Solution:

1. **Identify the positions of the letters in DDA:**
- D is in the 1st position.
- D is in the 2nd position.
- A is in the 3rd position.

2. **Analyze how DDA is transformed into ADD:**
- The letter in the 3rd position (A) moves to the 1st position.
- The letter in the 2nd position (D) remains in the 2nd position.
- The letter in the 1st position (D) moves to the 3rd position.
- Thus, the transformation can be summarized as: 3rd → 1st, 2nd → 2nd, 1st → 3rd.

3. **Apply the same transformation to RRB:**
- R is in the 1st position.
- R is in the 2nd position.
- B is in the 3rd position.

4. **Transform RRB according to the identified pattern:**
- The letter in the 3rd position (B) moves to the 1st position.
- The letter in the 2nd position (R) remains in the 2nd position.
- The letter in the 1st position (R) moves to the 3rd position.

5. **Resulting positions after transformation:**
- 1st position: B (from 3rd position)
- 2nd position: R (remains the same)
- 3rd position: R (from 1st position)

6. **Final answer:**
- Therefore, RRB transforms into BRR.

### Conclusion:
The answer to the analogy DDA : ADD :: RRB : ? is **BRR**.