Scientists were studying two types of hospital waste, X and Y for their disposal and their effect on environment. They plotted a graph showing change in their quantities over time, when dumped in an open field. Refer to the given graph and select the option that correctly identifies X and Y.

• A. X Y Syringes Cotton swabs                
• B. X Y Cotton bolls Broken scalpels
• C. X Y Broken scalpels Syringes                
• D. X Y Band-aids Medicines