The blood cell that secretes histamine,serotonin,and heparin is

Continuous bleeding from an injured part is due to the deficiency of $..........$.

Choose the incorrect sentence$(s)$.
$(I)$ $RBCs$ are formed in the white bone marrow in adults.
$(II)$ $RBCs$ have a red colour because of the presence of a protein called haemoglobin.
$(III)$ The nucleus is present in $RBCs$ in most mammals,and they are biconcave in shape.
$(IV)$ $A$ healthy individual has $12-16 \, g$ of haemoglobin in every $100 \, ml$ of blood.

The life span of human $WBC$ is approximately

Following are classified as plasma proteins $EXCEPT$ . . . . . . .

What is correct for albumins,globulins and fibrinogen?