Explanation:

Fourth option is incorrect i.e. AMRUT is a mission for the development of metro cities.
The purpose of Atal Mission for Rejuvenation and Urban Transformation (AMRUT) is to

(i) ensure that every household has access to a tap with assured supply of water and a sewerage connection; (ii) increase the amenity value of cities by developing greenery and well maintained open spaces (parks); and (iii) reduce pollution by switching to public transport or constructing facilities for non-motorized transport (e.g. walking and cycling). You can find detailed information about the Mission’s objectives, planning, funding, etc.