Perl is the name of the language; perl is the name of
The language also
The interpreter
A DOS command
Where can you always find a copy of the Perl documentation?
http://www.microsoft.com
http://www.perl.com
http://www.perl.net
In which manual page can you find a description of Perl's syntax?
perlsyn
perlop
perlfaq
b. After it's installed, perl is a valid command in a DOS shell, so c is acceptable also.
b. It's installed on your system as well.
a. Unless you actually run perldoc perl , there's no way you could have known for sure, now is there?
Browse through the FAQ. Even if you don't understand everything in there, you should get a feel for what kind of information is in the FAQ.
If you prefer reading it on a browser, surf to http://www.perl.com and read it there, but do peruse it.