Which of the four macromolecules are the largest

Newton's third law states that every action has an equal and opposite reaction. The action and reaction forces are pairs of opposing forces.

In the given examples all three obey Newton's third law.

B) Action force: John pulls the door handle

Reaction: door handle gets pulled

C) Action force: Tire pushes on road

Reaction: The road pushes on the tire, vehicle moves

D) Action force: Exhaust pushes out of a rocket

Reaction: Rocket is pushed forward

Ans A) All these are examples of Newtons third law