Match the following variables available to the user that are set internally by the shell, with their
descriptions:
1) $1 – $9 a) process ID of the shell
2) $* b) the string containing all the arguments to the shell
3) $? c) process ID of the last command run in the background
4) $$ d) positional parameters
5) $! e) exit status of the most recently executed command
A.
1-d, 2-a, 3-e, 4-b, 5-c
B.
1-d, 2-c, 3-a, 4-b, 5-e
C.
1-d, 2-b, 3-e, 4-a, 5-c
D.
1-d, 2-a, 3-c, 4-b, 5-e
Explanation: