Correct option is D
Given word - DISPROPORTIONATE
Step 1: Mark the position of letters
Step 2: Remaining letters after removing prime positioned letters from left end which are marked in red box (shown in step 1) - D P O O R T O A T E
Step 3: Remaining letters are arranged alphabetically from left - A D E O O O P R T T
Step 4: Applying operation of vowel and consonants
There are
5 vowels are there in the final arrangement.