What is the main difference between accounts insured by the FDIC and the SIPC?

Question 17 options:

a)	whereas FDIC accounts are insured for at least $250,000, SIPC accounts are only insured for $50,000

b)	SIPC accounts are only for bank deposits, whereas FDIC accounts are only for brokerage and mutual fund accounts

c)	FDIC insured accounts protects both principal and interest, whereas SIPC accounts only insures your assets are properly held in the custody of a firm, but not the value.

d)	SIPC is an older version of FDIC insurance that is rarely used today.