Enthuware

is the options second not valid as we have used --list-deps?
and if we had not used would the flag, will the option 2 be correct?

also why option 3 is incorrect?
It will list all the standard JDK modules on which moduleA depends.
I ran the command on my modular jar and got the standard module java.base

Option 2 is not valid because it will not list all the packages.

Option 3 is incorrect because it will list all the modules and not just standard jdk modules. Since all modules includes jdk modules, option 1 is preferred.

and if we had not used the flag --list-deps, will the option 2 be correct?

Yes, you can try out something like jdeps TestClass.class and see the output.