Answer
True
Work Step by Step
Electron states with the same values of quantum numbers $n$ and $l$ form a subshell.
For any given value of $n$, the values of $l$ can be $l = 0, 1, 2,...,(n-1)$
For any given value of $n$, there are $n$ possible values of $l$
There are $n$ subshells for each value of $n$.
Therefore, there are four subshells with $n=4$.
