Right choice is (a) Megaloblastic anemia
Explanation: Megaloblastic anemia cause the erythrocyte precursor cell to breakdown in the bone marrow resulting in large quantities of LDH1 and LDH2 isoenzyme. Hence it is not associated with increase of LDH activity in urine. Following are associated with increase of LDH activity in urine: Chronic glomerulonephritis, diabetic nephrosclerosis, bladder and kidney malignancies.