Which of the following systems does not have a neutral conductor as defined in Article 100?
A. 120-volt, 1-phase, 2-wire
B. 120/240-volt, 1-phase, 3-wire
C. 120/240-volt, 3-phase, 4-wire
D. 208Y/120-volt, 3-phase, 4-wire
A. 120-volt, 1-phase, 2-wire
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