How many pairs of letters are there in the word ATMOSPHERE which have as many letters between them as in the English alphabet ?

So, the question essentially asks to find out pairs of letters in the given word "ATMOSPHERE" which have same number of letter between them as there are in english alphabet. We can start with the first letter initially and then try to check for subsequent letters. Lets take A now AT have 19 letter between them in english alphabets, here they don't have any letter so this cannot be a possible pair. Lets move on to AM, again AM have just 1 letter between them which is not the case in actual english alphabets. Proceeding in a similar manner we can find that words fulfilling the given requirement are

MP, TP, HE, No other pair fits in the requirement, so answer is option 2.