Correct Option: D

harmonious (Adjective) : friendly, peaceful and without any disagreement; pleasing
incongruous (Adjective) : strange and not suitable in a particular situation; inappropriate
conflicting (Adjective) : in disagreement ; contradictory
contradictory (Adjective) : containing and showing a lack of agreement; conflicting
ill-matched (Adjective) : not well suited to or appropriate for each other