Q: 42 (NDA-II/2018)

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The connecting cable of electrical appliances like electric iron, water heater or contains three insulated copper wires of three different colours- red, green and black.
Which one of the following is the correct colour code?
question_year: 
2018
question_exam: 
NDA-II
stats: 
0,0,8,0,0,0,8