Which organ is considered as "Graveyard of $RBC$'' where most of them are destroyed by macrophages
Red bone marrow
Spleen
Kidney
Intestine
Who among the following established the scientific basis of vaccination?
Which of the following diseases is endemic
Assertion: Epstein-Barr virus is an oncovirus.
Reason: It stimulates the growth of cancer.
Which of the following does not cause a disease in human beings
The figure given below shows an antibody molecule. Name the parts $A, B$ and $C$