Each consonant in the word 'COMPARE' is changed to the letter following it in the English alphabetical order, and each vowel is changed to the letter preceding it in the English alphabetical order. Which of the following letters will appear twice in the group of letters thus formed?

Each consonant in the word 'COMPARE' is changed to the letter following it in the English alphabetical order,

And each vowel is changed to the letter preceding it in the English alphabetical order.

Based on the above information the newely formed word is:

In newly formed word two letter which is repeated twice is D and N.

Thus the correct answer is (C)