You Have Been Asked to Project Manage a Fiber Cable

You have been asked to project manage a fiber cable backbone installation. In the course of the installation, you notice the fiber cable with a 25 mm (1 in) outside diameter is being installed into a small TR, and the cable is being installed into a tight corner. Based on your knowledge of minimum bend radius requirements for fiber cable, you must ensure that the MINIMUM cable bend radius of _______________ is provided when the cable installation is completed.

A) 254 mm (10 in)
B) 305 mm (12 in)
C) 381 mm (15 in)
D) 457 mm (18 in)
E) 610 mm (24 in)