Choose the best alternatives in place of ? out of the four given alternatives (a), (b), (c), (d).
AG: IO :: EK , ?

Options

A. LR
B. MS
C. PV
D. SY

Explanation

To solve the analogy AG: IO :: EK: ?, we need to identify the relationship between the letters in the first pair (AG and IO) and apply the same relationship to the second pair (EK and ?).

### Step-by-Step Solution:

1. **Identify the Relationship in the First Pair (AG: IO)**:
- The first letter in the first pair is A and the second letter is G.
- The second pair consists of I and O.
- We need to determine how we move from A to I and from G to O.

2. **Calculate the Steps from A to I**:
- The position of A in the alphabet is 1.
- The position of I in the alphabet is 9.
- To find the difference, we calculate:
\( 9 - 1 = 8 \)
- This means we move 8 steps forward from A to get to I.

3. **Calculate the Steps from G to O**:
- The position of G in the alphabet is 7.
- The position of O in the alphabet is 15.
- To find the difference, we calculate:
\( 15 - 7 = 8 \)
- This means we also move 8 steps forward from G to get to O.

4. **Apply the Same Steps to the Second Pair (EK: ?)**
- We need to apply the same 8-step forward movement to the letters E and K.
- The position of E in the alphabet is 5.
- The position of K in the alphabet is 11.

5. **Calculate the First Letter of the Second Pair**:
- Move 8 steps forward from E:
\( 5 + 8 = 13 \)
- The letter at position 13 is M.

6. **Calculate the Second Letter of the Second Pair**:
- Move 8 steps forward from K:
\( 11 + 8 = 19 \)
- The letter at position 19 is S.

7. **Conclusion**:
- Therefore, the second pair corresponding to EK is MS.
- The answer is MS.

### Final Answer:
The best alternative in place of ? is **MS**.