Number of beds made by carpenter $C2 = (20-12) = 8$
Number of tables made by carpenter $C3 = (13-5) = 8$
Total number of chairs made by all carpenters $= 2+10+5+2+4= 23$
Total number of tables $= 7+2+8+3+10 = 30$
So, both statements are correct.
$C$ is correct Answer.