Find the option that best completes the analogy. AB : IJ :: EF : ?

Correct — A.
Rule: each letter moves forward 8 places.

A(1) + 8 = I(9) and B(2) + 8 = J(10), so AB → IJ.
E(5) + 8 = M(13) and F(6) + 8 = N(14).

EF → MN → option (a).

Why the others are wrong

• (b)
  OP — OP moves each letter 10 places (E → O, F → P). The first pair sets the move at 8, not 10.
• (c)
  QR — QR moves each letter 12 places (E → Q). That overshoots the +8 set by AB : IJ by 4 places.
• (d)
  KL — KL moves each letter 6 places (E → K, F → L). It falls 2 short of the +8 that turns A into I.

In letter analogies, convert each letter to its position (A = 1 … Z = 26) and find the change inside the first pair. Here both letters move by the same amount: A(1) → I(9) and B(2) → J(10), a move of +8.

Apply the identical move to the second pair: E(5) → M(13) and F(6) → N(14).

Key facts

• A = 1, E = 5, I = 9, M = 13: letters 4 apart, so +8 is two such jumps.
• A letter analogy applies the change found in the first pair, unchanged, to the second.
• KL and OP are the consecutive pairs either side of MN.

Common traps

• Counting the letters strictly between A and I (seven) instead of the places moved (eight)
• Miscounting by two letters and landing on KL or OP

No directly related past PYQ was found.