If \( f^{\prime}\left(x^{2}-4 x+3\right)0, \forall x \in(2,3) \); then \( f(\sin x) \) is increa...
If \( f^{\prime}\left(x^{2}-4 x+3\right)0, \forall x \in(2,3) \); then \( f(\sin x) \) is increasing on
(a) \( \bigcup_{n \in l}\left(2 n \pi,(4 n+1) \frac{\pi}{2}\right) \)
(b) \( \bigcup_{n \in l}\left((4 n-1) \frac{\pi}{2}, 2 n \pi\right) \)
(c) \( R \)
(d) \( \bigcup_{n \in l}\left((8 n-1) \frac{\pi}{2}, 2 n \pi\right) \)
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