Consider two circuits, and, each having two resistors. One of them has a positive temperature coefficient of resistance, +α, while the other one has…

Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance, $\displaystyle +\alpha$, while the other one has a negative temperature of coefficient, $\displaystyle -\alpha$, as shown in the figure. The current through these circuits are denoted by $\displaystyle I_A$ and $\displaystyle I_B$. At initial temperature, the resistance of the two resistors is $\displaystyle R_O$. As the temperature is increased, the correct option that describes the variation of current in these circuits is :