Select the statements that are true.
AB is a secant
CD is a chord.
AM is a tangent
A straight line which cuts a circle at two points is called the "secant of the circle" and a line segment which joins two points on the circumference is called the "chord".
The line which touches the circle at one point is the "tangent of the circle".
Hence, options (A), (B), and (D) are true.