JEE Main 2019 — Thermal Properties of Matter Question with Solution

Two identical beakers $\mathrm{A}$ and $\mathrm{B}$ contain equal volumes of two different liquids at $60°\mathrm{C}$ each and left to cool down. Liquid in $\mathrm{A}$ has density of $8\times {10}^2\mathrm{ }\mathrm{k}\mathrm{g} {\mathrm{m}}^{-3}$ and specific heat of $2000\mathrm{ }\mathrm{J}\mathrm{ }\mathrm{k}{\mathrm{g}}^{-1}{\mathrm{K}}^{-1}$ while the liquid in $\mathrm{B}$ has density ${10}^3\mathrm{ }\mathrm{k}\mathrm{g}{\mathrm{ }\mathrm{m}}^{-3}$ and specific heat of $4000 \mathrm{J}\mathrm{ }\mathrm{k}{\mathrm{g}}^{-1}{\mathrm{K}}^{-1}$. Which of the following best describes their temperature versus time graph schematically? (assume the emissivity of both the beakers to be the same)