A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
ND, IY, DT, YO, TJ, ….

Options

A. MP
B. NQ
C. OF
D. OE

Explanation

To solve the problem, we need to identify the pattern in the given letter pairs: ND, IY, DT, YO, TJ, …

### Step-by-Step Solution:

1. **Identify the Pattern in the First Letters:**
- The first letters of the pairs are: N, I, D, Y, T.
- Let's convert these letters to their corresponding positions in the alphabet:
- N = 14
- I = 9
- D = 4
- Y = 25
- T = 20
- Now, let's find the difference between these positions:
- N (14) to I (9): 14 - 9 = 5 (backwards)
- I (9) to D (4): 9 - 4 = 5 (backwards)
- D (4) to Y (25): 4 - 25 = -21 (but if we consider the circular nature of the alphabet, we can say we are moving backwards 5 steps)
- Y (25) to T (20): 25 - 20 = 5 (backwards)
- From this, we can see that we are consistently moving backwards by 5 positions in the alphabet.

2. **Finding the Next First Letter:**
- The last first letter we have is T (20).
- To find the next letter, we subtract 5 from T:
- T (20) - 5 = O (15).
- So, the first letter of the next pair is O.

3. **Identify the Pattern in the Second Letters:**
- The second letters of the pairs are: D, Y, T, O, J.
- Let's convert these letters to their corresponding positions in the alphabet:
- D = 4
- Y = 25
- T = 20
- O = 15
- J = 10
- Now, let's find the difference between these positions:
- D (4) to Y (25): 4 - 25 = -21 (but moving backwards 5 steps)
- Y (25) to T (20): 25 - 20 = 5 (backwards)
- T (20) to O (15): 20 - 15 = 5 (backwards)
- O (15) to J (10): 15 - 10 = 5 (backwards)
- This also shows a consistent pattern of moving backwards by 5 positions.

4. **Finding the Next Second Letter:**
- The last second letter we have is J (10).
- To find the next letter, we subtract 5 from J:
- J (10) - 5 = E (5).
- So, the second letter of the next pair is E.

5. **Combine the Letters:**
- We have found the first letter O and the second letter E.
- Therefore, the missing pair is OE.

### Final Answer:
The next pair in the series is **OE**.