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. Yellow
B: Red
Answer: B: Red 
Explanation: Ans. is `b' i.e., Red Microbial laboratory culture wastes are category No. 3. o Category 3 wastes have color code Fellow or red. o See above explanation.