Given question are based on five words given below : AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If the third alphabet of each of the words is changed to the next alphabet in the English alphabetical series, which of the Given will form a meaningful English word?
1) SUM
2) BIG
3) Both BIG and The
4) FOR
5) Both FOR and BIG

Explanation

1