The haemoglobin content per $100 \ ml$ of blood of a normal healthy human adult is

Which organ is considered as the "Graveyard of $RBCs$" where most of them are destroyed by macrophages?

Given below are two statements:
Statement $I$:
The coagulum is formed of a network of threads called thrombins.
Statement $II$:
Spleen is the graveyard of erythrocytes.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following is an anticoagulant?

The blood of an anaemic person contains an unusually large number of immature nucleated $RBCs$. Which of the following would you suggest as a dietary supplement to improve his condition?

Which of the following couples would a doctor advise not to have more than one child?