Two reactants A and B separately shows t...

Two reactants A and B separately shows two chemical reactions.Both reactions are made with same initial concentration of each reactant. Reactant A follows first order kinetics whereas reactant B follows second order kinetics. If both have same half lives, find the ratio of the ratios of their rates at the start of reaction and after the lapse of one half life.

`2:1`

`1:3`

`1:2`

`2:3`

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