চিত্রে তিনটি ব্লকের তাপমাত্রা যথাক্রমে $\theta_{1}{ }^{\circ} \mathrm{C},\ \theta_{2}{ }^{\circ} \mathrm{C}$ ও $\theta_{3}{ }^{\circ} \mathrm{C}$ যারা পরস্পরের সাথে তাপীয় সংস্পর্শে আছে।

$\begin{array}{|l|l|l|} \hline \theta_{1}{ }^{\circ} \mathrm{C} & \theta_{2}{ }^{\circ} \mathrm{C} & \theta_{3}{ }^{\circ} \mathrm{C} \\ \hline \text { (ক) } 5 & 10 & 5 \\ \hline \end{array}$

$\begin{array}{|l|l|l|}\hline \theta_{1}{ }^{\circ} \mathrm{C} & \theta_{2}{ }^{\circ} \mathrm{C} & \theta_{3}{ }^{\circ} \mathrm{C} \\ \hline \text { (খ) } 10 & 5 & 10 \\ \hline \end{array}$

$\begin{array}{|l|l|l|} \hline \theta_{1}{ }^{\circ} \mathrm{C} & \theta_{2}{ }^{\circ} \mathrm{C} & \theta_{3}{ }^{\circ} \mathrm{C} \\ \hline \text { (গ) } 15 & 15 & 15 \\ \hline \end{array}$

$\begin{array}{|l|l|l|} \hline \theta_{1}{ }^{\circ} \mathrm{C} & \theta_{2}{ }^{\circ} \mathrm{C} & \theta_{3}{ }^{\circ} \mathrm{C} \\ \hline \text { (ঘ) } 20 & 15 & 15 \\ \hline \end{array}$