A MINIMUM separation distance of 305 mm (12 in) between telecommunication cables and power cables with EMI exceeding 5 kVA is acceptable in which of the following cases?

A MINIMUM separation distance of 305 mm (12 in) between telecommunication cables and power cables with EMI exceeding 5 kVA is acceptable in which of the following cases?
A . Power cables are unshielded, while telecommunication cables are enclosed in a grounded metal conduit pathway.
B. Power cables are unshielded, while telecommunication cables are enclosed in a non-metal conduit pathway.
C. Power cables are unshielded and enclosed in a grounded metal conduit, while telecommunication cables are enclosed in a grounded metal conduit pathway.

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Answer: A