If \[k\le {{\sin }^{-1}}x+{{\cos }^{-1}}x+{{\tan }^{-1}}x\le K,\]then

1.	If \[k\le {{\sin }^{-1}}x+{{\cos }^{-1}}x+{{\tan }^{-1}}x\le K,\]then
A.	\[k=0,\,K=\pi \]
B.	\[k=0,K=\frac{\pi }{2}\]
C.	\[k=\frac{\pi }{2},K=\pi \]
D.	None of these
Answer» B. \[k=0,K=\frac{\pi }{2}\]

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If \[k\le {{\sin }^{-1}}x+{{\cos }^{-1}}x+{{\tan }^{-1}}x\le K,\]then

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