A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: D
Solution :
Coagulation is brought about by the hydrolysis of soluble fibrinogen to insoluble fibrin catalysed by the enzyme thrombin. Calcium ions \[(C{{a}^{2+}})\] are essential for activation and action of thrombin. Oxalate (Sodium or Potassium Oxalate) has the property to precipitate calcium ions kept, consequently oxalate can prevent coagulation.
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