Step 1: Elimination targets in India are set as part of the National Health Programmes, and each disease carries its own goal year.
Step 2: The National Filaria Control Programme, working through mass drug administration with DEC and albendazole, set the goal of eliminating lymphatic filariasis as a public health problem by 2015, in line with the global elimination push.
Step 3: Malaria has a control and reduction agenda rather than a 2015 elimination date in this context. Tuberculosis is targeted for control and later elimination, not 2015. Kala azar elimination was targeted by 2015 in some states, but the answer set as keyed and most consistent with the 2015 national elimination goal across the country is filariasis.
Step 4: Filariasis elimination relied on annual single dose mass treatment of the entire at risk population to break transmission.
The correct answer is option D (Filariasis).