To convert centigrams (cg) to kilograms (kg), you can use the following conversion:
1 centigram (cg) = 0.001 grams (g)
Since there are 1,000 grams in a kilogram, you can convert grams to kilograms:
0.001 g = 0.001 / 1000 kg = 0.000001 kg
Thus:
1 cg = 0.00001 kg
So the correct conversion from centigrams to kilograms in your options is:
1 cg = 0.00001 kg.