In the following question has four items. Select the item that does not belong to the group.

Step-by-step solution

Here in the question, we have to find the word which is the odd one out among the given four. Here, pulverisation means crunch or the act of crushing, detrition is also grinding process, trituration means the process of grinding something to a fine powder. Whereas purgation means the act of purifying or cleansing. Hence, purgation is the odd one because it has a different meaning.