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Globulins contained in human blood plasma are primarily involved in:

1. osmotic balance of body fluids.
2. oxygen transport in the blood.
3. clotting of blood.
4. defence mechanisms of body.

Correct answer: defence mechanisms of body.

Solution

Globulins include immunoglobulins, which are antibodies that help the body recognize and neutralize pathogens. That makes them mainly part of the immune defense system, not transport, clotting, or osmotic balance.

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