a 4 bit digital word (D) is used to represent an analog signal that varies from 0 V to 15 V. The digital word D corresponding to 7 V will be:

Correct option is C

​$$\begin{array}{|c|c|}\hline\textbf{Hexadecimal number} & \textbf{Binary representation} \\\hline0 & 0000 \\1 & 0001 \\2 & 0010 \\3 & 0011 \\4 & 0100 \\5 & 0101 \\6 & 0110 \\\mathbf{7} & \mathbf{0111} \\8 & 1000 \\9 & 1001 \\A & 1010 \\B & 1011 \\C & 1100 \\D & 1101 \\E & 1110 \\F & 1111 \\\hline\end{array}$$​​