An astable multivibrator circuit using $\text{IC 555}$ timer is shown below. Assume that the circuit is oscillating steadily.
The voltage $V_{C}$ across the capacitor varies between
- $3 \mathrm{V}$ to $5 \mathrm{V}$
- $3 \mathrm{V}$ to $6 \mathrm{V}$
- $3.6 \mathrm{V}$ to $6 \mathrm{V}$
- $3.6 \mathrm{V}$ to $5 \mathrm{V}$