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
The color code of plastic bag for disposing microbial laboratory culture waste – 
Select and explain. 
A. Black, B. Red, C. Blue, D. White
B: Red
Answer: B: Red 
Explanation: Microbial laboratory culture wastes are category No. 3.
Category 3 wastes have color code Yellow or red.
Wastes discarded in yellow bag are : (i) Category 1 (Human anatomical waste), (ii) Category 2 (Animal waste), (iii) Category 3 (Microbiology and Biotechnology waste), and (iv) Category 6 (Solid waste).