Given below are the steps of construction of two tangents to the circle (without using the centre of the circle) of radius 4 cm from point P. Which of the following steps is incorrect ?
Steps of Construction
Step I : Draw a circle of radius 4 cm and take a point P outside the circle and draw a secant PAB, intersecting the circle at A and B.
Step II : Produce AP to C such that AP = CP. Draw a semicircle with CB as diameter.
Step III : Draw `PD bot CB`, intersecting the semicircle at D. With P as centre and PC as radius draw arcs to intersect the given circle at T and T'.
Step IV : Join PT and PT' . Then, PT and PT' are the required tangents.

Options

A. Only Step I
B. Both Step I and Step II
C. Only Step III
D. Both Step II and Step IV

Answer

C