Correct choice is (b) 42 KB
Explanation: There are more than 80 extensions of the PHP source code. Mysql.so takes the size 42 KB, apc.so takes 655 KB, ffmpeg.so takes 35 KB, imap.so takes 86 KB, sasl.so takes 15 KB, tidy.so takes 42 KB, mysqli.so takes 107 KB, gd.so takes 94 KB.
