This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concepts of Immunity, Classification of Vaccines, Subject name: Social & Preventive Medicine
BCG vaccine is diluted with: 
Select and explain. 
A. Normal saline, B. Distilled water, C. Dextrose, D. Colloids
A: Normal saline
Answer: A: Normal saline 
Explanation: Lyophilized vaccines & their diluents: BCG vaccine - Normal saline Yellow fever vaccine - cold saline Japanese Encephalitis - phosphate buffer saline HiB - DPT / saline Measles, MMR - Distilled /sterile water