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This section contains 11 questions. Each question contains Statement I (Assertion) and Statement II (Reason). Each question has 4 choices (a), (b), (c) and (d) out of which only one is correct. The choices are
(a) Both Statement I and Statement II are individually true and \( \mathrm{R} \) is the correct explanation of Statement \( \mathrm{I} \).
(b) Both Statement I and Statement II are individually true but
Statement II is not the correct explanation of Statement I.
(c) Statement I is true but Statement II is false.
(d) Statement I is false but Statement II is true.
Statement I If \( x y+y z+z x=1 \), then
\[
\Sigma \frac{x}{\left(1+x^{2}\right)}=\frac{2}{\sqrt{\Pi\left(1+x^{2}\right)}} \text {. }
\]
Statement II In a \( \triangle A B C \sin 2 A+\sin 2 B-\sin 2 C \) \( =4 \cos A \cos B \sin C \)
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