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
In this type of question, usually four groups of letters are given. Three of them are similar to each other in same manner and one is different. Which is the one ?
Choose the group of letters which is different from others.

Options

A. FH
B. IK
C. PN
D. SU

Answer

To solve the problem, we need to analyze the groups of letters given and determine which one is different based on the number of steps between the letters.

### Step-by-Step Solution:

1. **Identify the Groups of Letters**:
- Option 1: F H
- Option 2: I K
- Option 3: P N
- Option 4: S U

2. **Calculate Steps for Each Option**:
- **Option 1 (F H)**:
- F is the 6th letter and H is the 8th letter.
- Steps from F to H: 8 - 6 = 2 steps forward.

- **Option 2 (I K)**:
- I is the 9th letter and K is the 11th letter.
- Steps from I to K: 11 - 9 = 2 steps forward.

- **Option 3 (P N)**:
- P is the 16th letter and N is the 14th letter.
- Steps from P to N: 14 - 16 = -2 steps (2 steps backward).

- **Option 4 (S U)**:
- S is the 19th letter and U is the 21st letter.
- Steps from S to U: 21 - 19 = 2 steps forward.

3. **Compare the Steps**:
- Options 1, 2, and 4 all involve moving 2 steps forward.
- Option 3 involves moving 2 steps backward.

4. **Identify the Odd One Out**:
- Since Options 1, 2, and 4 all have the same pattern of moving 2 steps forward, while Option 3 is different as it involves moving 2 steps backward, we conclude that Option 3 (P N) is the odd one out.

### Final Answer:
The group of letters that is different from the others is **Option 3: P N**.