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Hey There!</h2><h2>
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Answer:</h2>
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Consider two bodies A & B which collide with each other. If 
be the force exerted by the body A on Body B. Then Body B will also exert force 
on Body A which is equal in magnitude but opposite in direction.
The force exerted by Body A on Body B is called Action, and the force exerted by the Body B on Body A is called Reaction.
<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2>
Animals and god and humans
Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine.
Pyrimidines: Cytosine and Thymine each have a single six-member ring. Purines: Guanine and Adenine each have a double ring made up of a five-atom ring attached by one side to a six-atom ring.
