A 28-year-old primigravida from rural Maharashtra presents to a primary health centre at 32 weeks gestation with severe preeclampsia. She is managed with magnesium sulphate and antihypertensives. Labour is induced at 34 weeks, and she delivers a live male infant weighing 1.8 kg. The infant survives with neonatal intensive care. Two weeks postpartum, the mother develops sepsis from retained placental tissue and dies despite antibiotics and supportive care. The district health officer is reviewing maternal mortality data for the year. Which of the following vital statistics indicators would this death be classified under, and what is its epidemiological significance in India?