#### Answer

Since the truth table for $\mathrm{C}$ has 4 distinct inputs, there would be $2^{4}=16$
rows, representing the 16 possible inputs, 0000 to $1111 .$ There are 4 input
columns (for $a, b, c, d )$ and 3 output columns (for output-1, output- 2
and output-3), for a total of 7 columns. Thus the dimensions of the truth
table for circuit C would be $16 \times 7 .$