Who all had the surgery, how many people the surgery helped, an how many the surgery did not help.
Macrophages kill the cellular debris of the pathogens that are killed by the immune system. They are a type of white blood cells, and kill anything which does not have the proteins that are specific to the healthy cells of the body. Cancer cells, foreign substances, and microbes are engulfed by them.
I would say option A, when a drug kills most of the bacteria the ones left to breed are those that have a natural resistance to the drug.
97 Electrons are in Britannium
