In a cyclic quadrilateral $ABCD$, if $\angle ADB + \angle BDC = 1$ right angle, then which three points are collinear?

Question

Accepted Answer

$A,O,C$

Answer

$A,B,C$

Answer

$B,O,D$

Answer

$A,D,B$

In a cyclic quadrilateral ABCDABCDABCD, if ∠ADB+∠BDC=1\angle ADB + \angle BDC = 1∠ADB+∠BDC=1 right angle, then which three points are collinear?