Find the group of letters that best completes the analogy based on the given letter transformation pattern. CIRCLE : DJSFMD :: SQUARE : ?

Correct — B.
Rule: +1, +1, +1, +3, +1, −1, letter by letter.

CIRCLE → DJSFMD: C→D, I→J, R→S and L→M are each +1.
Fourth letter: C(3) → F(6) is +3. Sixth: E(5) → D(4) is −1.

SQUARE: S→T, Q→R, U→V and R→S, +1 each.
Fourth: A(1) + 3 = D(4). Sixth: E(5) − 1 = D(4).

That gives TRVDSD → option (b).

Why the others are wrong

• (a)
  YTUBN — YTUBN has five letters, and SQUARE has six. A letter-by-letter rule keeps the length, and Y is not S + 1 = T either.
• (c)
  CVBGF — CVBGF has five letters, one short of SQUARE's six, and it starts with C where the rule gives T.
• (d)
  QWERTY — QWERTY is the top row of letters on a keyboard, not a shift of SQUARE. Its first letter Q is S − 2, where the rule needs T.

A letter-transformation analogy applies one fixed step per position. Work out the step at each place in the first pair, then apply the same steps, place by place, to the second word.

The steps need not be equal. Here four positions move +1, the fourth moves +3 and the last moves −1, and each is copied across unchanged.

Key facts

• CIRCLE → DJSFMD moves the letters +1, +1, +1, +3, +1, −1.
• A(1) + 3 = D(4) and E(5) − 1 = D(4), so D appears twice in TRVDSD, in the fourth and sixth places.
• A letter-by-letter rule keeps the word's length, so check option lengths first.

Common traps

• Assuming every letter moves by the same step, which gives TRVBSF
• Reading the analogy through the words' meaning, shapes, rather than their letters

No directly related past PYQ was found.