<p>Which of the following statements are True in the context of circles?</p><ul><li>A. A tangent of a circle touches it at two points.</li><li>B. A circle can have two parallel tangents at the most.</li><li>C. There is no tangent to a circle passing through a point inside the circle.</li></ul><p>Choose the correct answer from the options given below:</p>
If the radius of each of four outer circles is $r$, then the radius of the innermost circle is <img src="https://balti.afterboards.in/KJbLKQT21zndr44" width=200px>
The radius of two concentric circles are 13 cm and 8 cm. AB is a diameter of the bigger circle. BD is tangent to the smaller circle touching it at D. The length AD is. <img src="https://balti.afterboards.in/8mo2utsVxt0y7Gf" width=200px>