Which of the following code snippets is correct?

Which of the following code snippets is correct? (Choose 2)

a)
interface Drawable {
abstract function draw();
}
b)
interface Point {
function getX();
function getY();
}
c)
interface Line extends Point {
function getX2();
function getY2();
}
d)
interface Circle implements Point {
function getRadius();
}

A.
a)

B.
b)

C.
c)

D.
d)