Weight of Sona is four times that of Mona. Weight of Mona is 2.5 times of Hona. Weight of Hona is 1.5 times of Dhona. Weight of Dhona is 2.5 times of Rona. Who is the heaviest?

Let Rona's weight = $$100$$ kg

Weight of Dhona is 2.5 times of Rona, => Dona's weight = $$2.5\times 100=250$$ kg

Weight of Hona is 1.5 times of Dhona, => Hona's weight = $$1.5\times 250=375$$ kg

Weight of Mona is 2.5 times of Hona, => Mona's weight = $$2.5\times 375=937.5$$ kg

Weight of Sona is four times that of Mona, => Sona's weight = $$4\times 937.5=3750$$ kg

$$\therefore$$ Sona is the heaviest.

=> Ans - (B)