Which of the following special shell variables is used to process number of the current shell ?

A. e
B. The MTA
C. The MUA
D. procmail

A. /sbin/usrquota
B. /sbin/edquota
C. /sbin/quotaon
D. /sbin/quota

A. 83
B. 82
C. 5
D. 4

A. cd
B. changedir
C. chdir
D. cdir

A. count p
B. wc
C. wcount
D. countw

A. pg
B. cat
C. lp
D. /p