खालीलपैकी अशुद्ध शब्द निवडा.

20. खालीलपैकी अशुद्ध शब्द निवडा. (1) कणिस (2) फूल (3) ऑक्सिजन (4) परिसर All options appear to be correctly spelled Marathi words. However, if a choice must be made, and assuming a subtle error, it is difficult to pinpoint. Based on common usage and standard spelling, all are correct. If there is an intended incorrect word, it is not immediately apparent. Assuming the question expects an answer, and without further context or clarification on what constitutes "अशुद्ध" (incorrect) in this specific context, it is impossible to definitively choose. However, if forced to select, sometimes borrowed words like "ऑक्सिजन" can have variations in transliteration, but the given spelling is standard.