In a certain code language 24685 is writen as 33776. How is 35791 written in that code ?

Answer: A. 44826

Clearly, in the code the letters at odd places are one place ahead and those at even places are one place before the corresponding letter in the word.
So, in 35791, 3 is written as 4,
5 as 4,
7 as 8,
9 as 8  and
1 as 0
i.e. the code becomes 44880.