ABC is a triangle right angled at B. Let...

ABC is a triangle right angled at B. Let M and N be two points on AB such that AM = MN = NB. Let P and Q be two points on AC such that PM is parallel to QN and QN is parallel to CB. If BC= 12 cm, then what is (PM + QN) equal to?

A

10 cm

B

11 cm

C

12 cm

D

13 cm

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