A problem village is one where ?
Ans. is `d' i.e., All of the above A problem village has been defined as one Where no source of safe water is available within a distance of 1.6 km, or Where water is available at a depth of more than 15 meters, or Where water source has excess salinity, iron, fluorides and other toxic elements, or Where water is exposed to the risk of cholera.
Source of water > 1.6 km away
Water available > 15 meters depth
Excess of fluoride in water
All of the above