Two figures are shown as Fig. $A$ and Fig. $B$. The time constant of Fig. $A$ is $\tau_{A}$ and the time constant of Fig. $B$ is $\tau_{B}$. Then:

• A
  $\tau_{A}=\frac{1}{4} \text{ s}$ and $\tau_{B}=5 \text{ s}$
• B
  $\tau_{A}=\frac{1}{2} \text{ s}$ and $\tau_{B}=\frac{1}{5} \text{ s}$
• C
  $\tau_{A}=4 \text{ s}$ and $\tau_{B}=5 \text{ s}$
• D
  $\tau_{A}=2 \text{ s}$ and $\tau_{B}=1 \text{ s}$