Here's a problem to solve: Examine each of these chemical equations to determine which equation is correctly balanced.

Among the 4 following options, which is the correct answer?

- A: Mg(NO_{3})_{2} + K_{2}CO_{3} -> MgCO_{3} + KNO_{3}
 
- B: Mg(NO_{3})_{2} + K_{2}CO_{3} -> MgCO_{3} + 2KNO_{3}
 
- C: 2Mg(NO_{3})_{2} + K_{2}CO_{3} -> 2MgCO_{3} + KNO_{3}
 
- D: Mg(NO_{3})_{2} + 2K_{2}CO_{3} -> MgCO_{3} + 2KNO_{3}
 