Letters of the word SUDESH can be arranged in

A)(UE),S,S,D,H can be arranged in $(2!)\frac{5!}{2!}$ways.

$\text{ A) }(2!)\frac{5!}{2!}$=120

B) two vowels occupy  in alphabetical order 

Out of 6 letters two are vowels and two are identical

$\text{ B) }\frac{6!}{2!2!}$=180

C) Vowels U,E can be arranged in 2! ways

and consonants can be arranged in $\frac{4!}{2!}$ways

$\text{ C) }\frac{4!}{2!}(2!)$=24

D) vowels do not occur together.

Total arrangements- number of arrangements in which vowels come together -

$\text{ D) }360-120$=240