The letters of the English alphabet are coded as follows: kth letter of the alphabet is coded as

(i) (k+17)th letter when 1 ≤ k ≤ 9

(ii) (k-1)th letter when 10 ≤ k ≤ 18

(iii) (k-18)th letter when 19 ≤ k ≤ 26

For decoding reverse process is used. The word that is coded as GAURD is

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Telangana Police SI Prelims 2022 Official Paper
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  1. YRCQU
  2. YSDAV
  3. XRDPV
  4. YSDNA

Answer (Detailed Solution Below)

Option 2 : YSDAV
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Detailed Solution

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The logic followed here is: kth letter of the alphabet is coded as:

(i) (k+17)th letter when 1 ≤ k ≤ 9

(ii) (k-1)th letter when 10 ≤ k ≤ 18

(iii) (k-18)th letter when 19 ≤ k ≤ 26

For decoding reverse process is used.

So, the word that is coded as GAURD is:

Letter G A U R D
Place value 7 1 21 18 4
Reversing the rules (7 + 18)  (1 + 18) (21 - 17) (18 - 17) (4 + 18)
Place value after applying rules 25 19 4 1 22
Resultant letter  Y S D A V

Thus, 'YSDAV' is coded as 'GAURD'.

Hence, "Option 2" is the correct answer.

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