All of the following drugs enhances bone resorption except:: (A) Prostaglandins, (B) Vitamin D, (C) Corticosteroids, (D) Bisphosphonates
Answer is D. Various promoter drugs: (enhance bone resorption)

Prostaglandins
Leukotrienes
Cytokines
Vitamin D
Osteocalcin
Corticosteroids

Supressor agents: (Reduce bone resorption)

NSAIDS
Bisphosphonates (used in treatment of cancers and osteoporosis)