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B
Inorganic substances
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C
Organic substances
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D
Blood cells
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Solution
The correct option is B Water One half of blood is composed of red blood cells, white blood cells and platelets which are considered as solid part of blood and another half is composed of water, salts and proteins which is the fluid part of blood. The fluid part of blood is known as plasma. Plasma is a straw coloured, viscous fluid it has about 90-92% water and 6-8% proteins. Hence a major component of blood plasma is water.