How many such pairs of letters are there in the word COMPUTER each of which has as many letters between them in the word as in the English alphabet ?

We can start from the first word and make it pairs with remaining ones and then check if they meet our requirement or not, So to start with let's take CO. Now CO does not have any letter between them in the given word which is not the case in actual english alphabets. So CO is not a possible pair, moving on to CM, we can see that this also does not meet the requirement as there are 11 letters between C and O in english whereas here there is just 1. Proceeding in a similar manner we can see that the following pairs meet our requirement.
MR UT UR TR
So since we have 4 pair of words, the correct answer is Option 5