This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which hag among the following shouldn't be incinerated as it contains cadmium? 
Select and explain. 
A. Blue, B. Red, C. Black, D. Yellow
B: Red
Answer: B: Red 
Explanation: Ans. is 'b' i.e., Red Red bags must not be incinerated as red colour contains cadmium, which causes toxic emissions.