Choice "b" is correct. Capital assets include all marketable securities
unless the taxpayer is a dealer.
Choice "a" is incorrect. Accounts receivable of a business are excluded from
the definition of capital assets.
Choice "c" is incorrect. All depreciable assets of a business are excluded
from the definition of capital assets. They are defined as Section 1231
assets.
Choice "d" is incorrect. Inventory of a business is excluded from the
definition of capital assets.