Combinatories

Answer : A

Explanation :

3 consonants out of 5 can be selected in ⁵C₃ ways.
2 vowels out of 4 can be selected in ⁴C₂ ways.
Therefore, total number of groups each containing 3 consonants and 2 vowels =  ⁵C₃  * ⁴C₂ = 5*6=30
Each group contains 5 letters, which can be arranging in 5! ways.

Therefore required number of words = 30* 5! = 3600