During an allergic reaction, the binding of antigens to IgE antibodies initiates a response, in which chemicals cause the dilation of blood vessels and a host of other physiological changes. Such chemicals are

Which of the following disease is now considered nearly eradicated from India

Identify the wrongly matched pair.

Vibrio cholerae is a motile bacteria belonging to the group of

Which organ is considered as "Graveyard of $RBC$'' where most of them are destroyed by macrophages