Answer
(c) A smallest
and B largest
Work Step by Step
We have
$ Q= cm\Delta T$
Or $\Delta T = \frac{Q}{cm}$
For same $Q$, $\Delta T $ is inversely proportional to product of $c $ and $m$.
Thus $\Delta T$ will be maximum if $cm$ is minimum and $\Delta T $ will be minimum if $cm$ is maximum.
Sample A has maximum $cm$ implying minimum temperature drop.
Sample B has minimum $cm$ implying maximum temperature drop.
