Which of the following conversions is INCORRECT?

a. 1 kilogram = 100 gram
b. 1000 milligram = 1 kilogram
c. 1 gram = 1000 milligram
d. 1 milligram = 1000 kilogram

c
Rationale: a. 1 kg = 1000 grams
b. 1000 mg = 1 gram
c. Correct.
d. 1 mg = 0.001 gram