Concept:Perfunctory means doing something with minimal effort or interest, often just going through the motions without real care. Explanation:The word "Perfunctory" describes an action done hastily and without genuine attention, like a routine duty. Its synonym is "Careless", which means lacking attention or thoroughness, showing negligence. Example: His perfunctory nod showed he wasn't really listening. Thus, both words convey a lack of genuine care or effort in performing a task. Answer:Option B: Careless