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How many such pairs of letters are there in the word DOLPHIN (in both the forward and backward directions) which have as many letters between them in the words as there are in the English alphabetical order?

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RRB NTPC CBT 2 Level -6 Official paper (Held On: 9 May 2022 Shift 2)
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  1. None
  2. Four
  3. Two
  4. Three

Answer (Detailed Solution Below)

Option 2 : Four
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Detailed Solution

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Given word: DOLPHIN

The alphabets are positioned in the following order-

The given word can be represented as follows-

In forward direction: DH, DI, HI

In backward direction: IL

Thus, here are four pairs of such letters.

Hence. 'option 2' is the correct answer.

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