Blood

The major plasma proteins are fibrinogen, globulins and albumins.
Fibrinogen is needed for clotting (coagulation) of blood: the enzyme thrombin converts soluble fibrinogen into insoluble fibrin threads, which form a network that traps the formed elements to make the clot.
Albumins help in maintaining the osmotic balance.
Globulins are primarily involved in the defence mechanisms of the body.
Serum amylase is an enzyme and has no role in clotting.
Hence the plasma protein involved in coagulation is fibrinogen.

RBCs contain the red, iron-containing complex protein haemoglobin, which carries the respiratory gases.
NCERT states that a healthy individual has 12–16 g of haemoglobin in every 100 ml of blood.
Values below this range indicate anaemia.
Hence the haemoglobin content is 12 – 16 g per 100 ml of blood.