What is the maximum period within which stored blood should be transfused?

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:

Globulins contained in human blood plasma are primarily involved in:

Erythroblastosis foetalis can occur if

Which $WBC$ has the maximum lifespan?

Persons with $AB$ blood group are called as "Universal recipients". This is due to: