Decreased mineralization of Epiphyseal plate in a growing child is seen in -
Defective mineralization is seen in both rickets and osteomalacia.
However, the question is about defective mineralization in the Epiphyseal plate (growth plate/physics) in a growing child, which is seen in rickets.
Osteomalacia is a disease of the mature skeleton when physis (epiphyseal plate) has already been fused. There is no physics (epiphyseal plate) in a mature bone.
Rickets
Osteomalacia
Scurvy
Osteoporosis