The correct option is option(A)
![\frac{\theta_{1}-\theta_{2}}{t}=\alpha\left[\frac{\theta_{1}+\theta_{2}}{2}-\theta_{0}\right]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-597befbd89585d691ac9e04e8f14c5d3_l3.png "Rendered by QuickLaTeX.com")
![\frac{135-80}{60}=\alpha\left[\frac{135+80}{2}-25\right] \ldots \ldots \ldots \text { (i) }](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-61234352a37deca2323e7facdbf8b95d_l3.png "Rendered by QuickLaTeX.com")
![\frac{80-\theta}{60}=\alpha\left[\frac{80+\theta}{2}-25\right]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-7bbe1d118a8e3af477020811c752ba06_l3.png "Rendered by QuickLaTeX.com")
Solving these two equations, we get 
If the body cools from 
![\[\begin{array}{l} (A) (52.5)^{\circ} \mathrm{C} \\ (B) (10.5)^{\circ} \mathrm{C} \\ (C) (52.75)^{\circ} \mathrm{C} \\ (D) (10.75)^{\circ} \mathrm{C} \end{array}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-c54ef4a8fddcd649ab22c466efbda955_l3.png "Rendered by QuickLaTeX.com")
