Answer is D (Gallium Nitrate) Gallium Nitrate exes s hypocalcemic effect by inhibiting calcium resorption from bone. Maximum hypocakemic effect of gallium nitrate may take 3-4 days to appear and it is not often used now because of availability of superior alternatives. Gallium nitrate is the single best answer of exclusion. Treatment of Hypercalcemia Onset of Action Hydration with Saline Hours Forced diuresis (saline + loop diuretic) Hours Calcitonin Hours Intravenous phosphate Hours Pheomycin / Mithromycin Hours Dialysis Hours Biphosphonates Days (1 to 2 days) Glucocoicoids Days Gallium Nitrate Days (3-4 days)