Assertion :For the manufacture of steel, open hearth process is preferred to Bessemer process.
Reason: Pure oxygen is used in open hearth process.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
For the manufacture of steel, the open-hearth process is preferred to Bessemer process because there are many advantages in the open-hearth process than Bessemer process because
$1.$ The quality of steel is very high than the quality of steel in the Bessemer process.
$2.$ The composition of steel can be controlled whereas in the Bessemer process cannot be controlled.

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