Infection of pneumonia occurs due to
Droplets released from an infected person
Released droplets inhaled by healthy person
Sharing contaminated objects such as glasses and utensils with an infected person
All of the above
The smallest virus one, which causes
Which organ is considered as "Graveyard of $RBC$'' where most of them are destroyed by macrophages
Psychoanalysis was founded by
Which of the following is related to humoral immunity?