If $y = x\sin x,$then
- A${1 \over y}{{dy} \over {dx}} = {1 \over x} + \cot x$
- B${{dy} \over {dx}} = {1 \over x} + \cot x$
- C${1 \over y}{{dy} \over {dx}} = {1 \over x} - \cot x$
- DNone of these
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