In each of the following questions, a specific rearrangement pattern has been applied to the first word to form the second. Apply the same rearrangement to the third word and choose the correct answer from the given alternatives. PRINTING : RPNIITGN :: PROTOCOL : ?

Correct — D. Split PRINTING into pairs: PR IN TI NG.

Rule: reverse the two letters inside each pair.

PR → RP, IN → NI, TI → IT, NG → GN gives RPNIITGN, as printed.

PROTOCOL in pairs: PR OT OC OL
Each pair reversed: RP TO CO LO
That spells RPTOCOLO, option (d).

Why the others are wrong

• (a)
  RPTOCOOL — RPTOCOOL reverses the first three pairs but leaves the last pair as OL. The rule reverses every pair, so the word must end in LO.
• (b)
  RPOTCOLO — RPOTCOLO leaves the second pair as OT. Reversed, it becomes TO, so the third and fourth letters must read T then O.
• (c)
  PRTOOCOL — PRTOOCOL reverses only the second pair, OT → TO, and leaves PR, OC and OL untouched. PRINTING shows every pair reversed, starting with PR → RP.

A rearrangement analogy keeps the same letters and changes only their order. Check that first: PRINTING and RPNIITGN both hold P, R, I, I, N, N, T and G.

Then find the block size. Read two letters at a time and each block of the code is the matching block of the word, reversed in place: RP, NI, IT, GN.

PROTOCOL also has eight letters, so it splits into four clean pairs and each one flips.

Key facts

• PRINTING → RPNIITGN reverses letters 1 and 2, 3 and 4, 5 and 6, and 7 and 8.
• PROTOCOL splits as PR, OT, OC, OL, which reverse to RP, TO, CO, LO.
• A rearrangement never changes which letters appear, only their order.

Common traps

• Reversing most of the pairs and missing one, which produces RPTOCOOL or RPOTCOLO.
• Treating the code as a letter shift, when every letter of PRINTING is still present in RPNIITGN.

No directly related past PYQ was found.