Question

5
.
In Figure-1, from an external point P, two tangents PQ and PR are
drawn to a circle of radius 4 cm with centre 0. If _ QPR = 90°, then
length of PQ is

(A) 3 cm
(B) 4 cm
(C) 2 cm
(D) 2

Answer 1

Answer:

the answer is 4cm I think so not sure