Which is the longest chord of circle and its length in terms of radius of circle?

Question : Select the INCORRECT statement with respect to the properties of a circle.

Option 1: Two tangents drawn at the end of the diameter of a circle are parallel.

Option 2: The radius drawn perpendicular to a chord bisects the chord.

Option 3: The diameter of a circle is the longest chord of a circle.

Option 4: The perpendicular distance from the centre of a circle increases when the length of a chord increases.

Question : Which of the following statements is INCORRECT?

Option 1: The radius is the longest chord of a circle.

Option 2: The ratio of the circumference of two circles is equal to the ratio of their radii.

Option 3: The perpendicular drawn from the centre of the circle on the chord of the circle bisects the chord.

Option 4: Circles are congruent to each other if they have equal radii.