Which of the following statements refers to plicamycin (formerly mithramycin):
a) Duration of action is usually several days b) Mechanism of cytotoxic action appears to involve its binding to DNA, possibly through an antibiotic-Mg2+ complex.
c) The **** causes plasma calcium levels to decrease, apparently through an action on osteoclasts that is independent of its action on tumor cells and useful in hypercalcemia.
d) All of the above.
