B).

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$\"\"$

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$\"\"$

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$\"\"$

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Let, $\"\"$ .

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Derivative on each side.

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Apply formula : $\"\"$ .

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$\"\"$

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Put , $\"\"$

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$\"\"$ .

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$\"\"$ $\"\"$ .

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C).

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$\"\"$

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$\"\"$ .

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Apply formula : $\"\"$ .

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$\"\"$ .

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$\"\"$ $\"\"$

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E).

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$\"\"$

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$\"\"$

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$\"\"$

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Apply formula : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ $\"\"$