An $8$-bit $\text{ADC}$ converts analog voltage in the range of $0$ to $+5 \mathrm{~V}$ to the corresponding digital code as per the conversion characteristics shown in figure. For $V_{\text {in }}=1.9922 \mathrm{~V}$, which of the following digital output, given in hex, is true?
- $64 \mathrm{H}$
- $65 \mathrm{H}$
- $66 \mathrm{H}$
- $67 \mathrm{H}$