Both a number and a letter are used in designating an electron subshell. The letter?

Question

1. indicates the shell to which the subshell belongs.
2. may be s, p, d, or f.
3. gives information about the maximum number of electrons the subshell may hold.
4. more than one of the above answers are correct.
5. none of the above answers are correct.

Answer 1

4 - both #2 and #3 are correct