6
18
15
12
Answer is Right!
Answer is Wrong!
The correct answer is B. 18.
A sucrose molecule is made up of one glucose molecule and one fructose molecule. Glucose has 6 carbon atoms, and fructose has 6 carbon atoms. Therefore, a sucrose molecule has 18 carbon atoms.
Option A is incorrect because glucose has 6 carbon atoms, not 3.
Option C is incorrect because fructose has 6 carbon atoms, not 15.
Option D is incorrect because glucose and fructose each have 6 carbon atoms, so the total number of carbon atoms in a sucrose molecule is 18, not 12.