In each of the following questions, the second word is formed by rearranging the letters of the first word using a specific transformation, such as reversal or block shifting. Identify that transformation and apply it to the third word to choose the correct option. KITCAT : CATTIK :: PENTOP : ?

Correct — B.
Rule: split in halves, put the second half first, then the first half backwards.

KITCAT = KIT | CAT → CAT + TIK = CATTIK.
PENTOP = PEN | TOP → TOP + NEP = TOPNEP.

Position check: CATTIK takes KITCAT's letters in the order 4, 5, 6, 3, 2, 1.
PENTOP in that order gives T, O, P, N, E, P → option (b).

Why the others are wrong

• (a)
  TOPPEN — TOPPEN swaps the halves but keeps PEN forwards. Applied to KITCAT, that gives CATKIT, not CATTIK: the moved half must be reversed.
• (c)
  POPTEN — POPTEN opens with POP, which is neither half of PENTOP. The rule opens with the untouched second half, TOP.
• (d)
  POPNET — POPNET also opens with POP instead of TOP, and its closing NET is not PEN reversed, which is NEP.

A rearrangement analogy hides a fixed operation. Split the word where the pattern suggests, here into two blocks of three, and ask what happened to each block.

In KITCAT, CAT moves to the front unchanged, and KIT moves to the back reversed, as TIK. Numbering the letters confirms it: the second word takes letters 4, 5, 6, 3, 2, 1.

Key facts

• KITCAT → CATTIK takes the letters in the order 4, 5, 6, 3, 2, 1.
• PENTOP in the order 4, 5, 6, 3, 2, 1 gives TOPNEP.
• Swapping the halves alone would turn KITCAT into CATKIT.

Common traps

• Swapping the halves without reversing the moved one, which gives TOPPEN
• Guessing the rule from PENTOP alone without testing it on KITCAT first

No directly related past PYQ was found.