Question

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$\huge\bold\red{HellO..}\huge\bold\orange{Frnds!}$
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$<marquee behaviour=move bgcolor=yellow><h1> ●●●Plzz FOLLOW me●●● </h1></marquee>$
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What is Retention? ☺☺
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$<marquee behaviour=move bgcolor=pink><h1> ●●●Need FOLLOWers●●● </h1></marquee>$​

Answer 1

The product which same in configuration as reactant.....is called retention