How many such pairs of letters are there in the meaningful word ‘COMMERCIAL’ each of which has as many letters between them in the word as in the English alphabet (from both backward and forward)?

Select the letter that can replace the question mark (?) in the following series.

A, D, ?, P, Y

If first and ${26}^{\mathrm{th}}$, $2^{\mathrm{nd}}$ and ${25}^{\mathrm{th}}$, $3^{\mathrm{rd}}$ and ${24}^{\mathrm{th}}$ and so on letters of the English alphabet are paired, then which of the following pairs is not correct?

If all the letters in the word FIGURES are arranged in alphabetical order from left to right in such a way that vowels are arranged first followed by consonants, then how many letters are there in between U and R after the arrangement?

How many meaningful two-lettered English words can be made by taking letters from the later half of the English alphabet ?

$\mathrm{A} \mathrm{B} \mathrm{C} \mathrm{D} \mathrm{E} \mathrm{F} \mathrm{G} \mathrm{H} \mathrm{I} \mathrm{J} \mathrm{K} \mathrm{L} \mathrm{M} \mathrm{N} \mathrm{O} \mathrm{P} \mathrm{Q} \mathrm{R} \mathrm{S} \mathrm{T} \mathrm{U} \mathrm{V} \mathrm{W} \mathrm{X} \mathrm{Y} \mathrm{Z}$

How many such pairs of letters are there in the word 'TEACH' each of which has as many letters between them in the word (in both forward and backward directions) as they have between them in the English alphabetic series?

The following questions are based on five words given below:
RAT, ONE, BUT, AND, SAW (The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If the given words are arranged in the order as they would appear in the dictionary from left to right which of the following would be fourth from the left?