Which of the following is called a real law of motion?

Which of the following is called a real law of motion? Correct Answer Second law

First law is contained in the second law: In the absence of external force a body at rest will remain at rest and a body in motion will continue to move. Third law is contained in the second law: In the absence of external force, the rate of change of momentum must be zero. This is the third law of motion. As both first and second law are confined in the second law, it the real law of motion.
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