Which of the following statements regarding health savings accounts $($HSAs$)$ is CORRECT?

Question $4$ options:

a$)$

HSAs permit non$-$medical expense related withdrawals penalty free if age $65$ or older.

b$)$

Similar to IRA indirect rollover rules, HSA funds can only be transferred between custodians one time per $12-$month period.

c$)$

HSA employee contributions through a Section $125$ Cafeteria Plan reduce federal and state taxes, but not FICA$/$payroll taxes.

d$)$

An HSA allows for contributions past age $65$ while on Medicare.