Which propulsion system is most commonly used for interplanetary missions?

More from Space Propulsion MCQ:

• Specific impulse in rocket propulsion is measured in:
• Which of the following propulsion methods uses photons for thrust?
• The main advantage of electric propulsion over chemical propulsion is:
• Hall effect thrusters accelerate ions using:
• Nuclear thermal rockets use:
• Which propulsion type has the highest theoretical specific impulse?