In the given figure, O is the centre of the circle and\[\ge \], then

1.	In the given figure, O is the centre of the circle and\[\ge \], then
A.	\[m+n=90{}^\circ \]
B.	\[m+n=180{}^\circ \]
C.	\[m+n=120{}^\circ \]
D.	\[m+n=150{}^\circ \]
Answer» B. \[m+n=180{}^\circ \]

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In the given figure, O is the centre of the circle and\[\ge \], then

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