In the given word ‘ALONGSIDE’ the consonants are written first and vowels are written second in alphabetical order then the vowels are changed to the next letter and the consonants are changed to the previous letters as per the alphabetical series, then which letter is fifth from the left end.

In the given word ‘ALONGSIDE’ the consonants are written first and vowels are written second in alphabetical order then the vowels are changed to the next letter and the consonants are changed to the previous letters as per the alphabetical series, then which letter is fifth from the left end. Correct Answer R

The operation on ALONGSIDE is as performed:

the consonants are written first and vowels are written second in alphabetical order- D G L N S A E I O

the vowels are changed to the next letter and the consonants are changed to the previous letters as per the alphabetical series- 

C F K M R B F J P

The letter R is fifth from the left end.

Hence, the correct answer is R.