Sir Frederick Banting discovered one of the following vaccines?

Sir Frederick Banting discovered one of the following vaccines?

سر فریڈرک بینٹنگ نے درج ذیل میں سے کونسی ایک ویکسین دریافت کی؟
Explanation

On 21 July 1921, a young surgeon named Frederick Banting and his assistant Charles Best

Image result for Insulin was discovered by Sir Frederick G Banting

On 11 January 1922, insulin was first used in the treatment of diabetes

Sh10-8-2023