This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
Strain used for BCG vaccine- 
Select and explain. 
A. Jeryl lynn, B. Danish 1331, C. 17 D, D. Mortaten
B: Danish 1331
Answer: B: Danish 1331 
Explanation: Ans. is 'b' i.e., Danish 1331 Vaccine Strains* Rubella RA 27/3* IPV(Salk)* OPV (Sabin)}P1, P2, P3 strains (mono or trivalent)* Measles Edomonston Zagreb strain (most common)Schwarts strainMortaten strain* Mumps Jeryll Lynn strain* Chicken pox OKA strain* BCG Danish 1331* JE Nakayam strain (MC), Beizing P3 strain, SA 14-14-2* Yellow fever 17 D* Malaria SPf.66, Pf 25* HIV mvA (modified vaccinia ankara) rAAV (recombinant adeno associated viral) AIDSVAX Subunit vaccine strain