When an unripe banana is sealed in a polythene bag, it remains green for many days. But if an apple is also sealed in the same bag, the banana ripens and turns yellow within a few days. The reason is that apple [BHU 1994]

• A. Removes\[{{O}_{2}}\]released by the banana and thus promotes ripening
• B. Produces\[C{{O}_{2}}\]which promotes ripening
• C. Removes\[C{{O}_{2}}\]which inhibits ripening
• D. Releases ethylene which promotes ripening