Which of the following statements is always true for any circle?
a) A line drawn through the centre that meets a chord at one of its endpoints is perpendicular to the chord.
b) Any line drawn through the midpoint of a chord is perpendicular to that chord.
c) A line drawn through the centre that bisects a chord is perpendicular to the chord.
d) Any line drawn perpendicular to a chord passes through the centre of the circle.