Assertion :Prothrombin is essential for blood clotting Reason: Prothrombin is synthesised in the liver in the presence of $C a^{+ +}$

Both statements 1 and 2 are correct

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Statement 1 is correct but statement 2 is incorrect

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Statement 1 is incorrect but statement 2 is correct

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Both statements 1 and 2 are incorrect

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Solution

The correct option is B Statement 1 is correct but statement 2 is incorrect
Prothrombin is essential for blood clotting as it is converted to thrombin by various activator factors. Thrombin catalyses the conversion of soluable fibrinogen to insoluable fibrins, which form a clot in presence of factor VIII.
Prothrombin is synthesized in the liver in presence of vitamin K.
So, the correct answer is 'Statement 1 is correct but statement 2 is incorrect'

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Statement 1: Carbon always forms covalent bond with other elements.
Statement 2: $C^{+ 4}$ and $C^{- 4}$ ions are highly unstable.

C^{+ 4}

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Statement 2: $C^{+ 4}$ and $C^{- 4}$ ions are highly unstable.

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