To whom can a person with $A^+$ blood group donate blood?

Blood clotting in a test tube can be prevented by adding a small amount of ........

Which protein is present in blood plasma?

Which of the following statements are correct?

$A$. Basophils are most abundant cells of the total WBCs

$B$. Basophils secrete histamine, serotonin and heparin

$C$. Basophils are involved in inflammatory response

$D$. Basophils have kidney shaped nudeus

$E$. Basophils are agranulocytes

Choose the correct answer from the options given below:

Which of the following blood cells in humans is known to be enucleated (lacking a nucleus)?

Which of the following is true regarding white blood cells $(WBCs)$?