In which of the following animals does the ma | vedclass

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(C) The heart of a frog is $3$-chambered,consisting of two atria and one ventricle.In the ventricle,oxygenated blood (from the left atrium) and deoxyg

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(C) The heart of a frog is $3$-chambered,consisting of two atria and one ventricle.In the ventricle,oxygenated blood (from the left atrium) and deoxygenated blood (from the right atrium) mix together before being pumped out to the body and lungs.Sharks have a $2$-chambered heart where only deoxygenated blood flows.Rabbits have a $4$-chambered heart,which completely prevents the mixing of oxygenated and deoxygenated blood.Therefore,the maximum mixing occurs in the $3$-chambered heart of the frog.

In which of the following animals does the maximum mixing of oxygenated and deoxygenated blood occur in the ventricles?

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