Q. How Kumbh mela is organised in India?
Answer: Every 12 years at 4 locations
Notes: Kumbha (Kumbha means pot) Mela is a sacred Hindu pilgrimage that takes place at the following four locations of India: 

1. Prayag (near the city of Allahabad, in the state of Uttar Pradesh) at the confluence of three rivers Ganga (Ganges), Yamuna and Saraswati 
2. Haridwar (in the state of Uttarakhand) where the river Ganga enters the plains from Himalayas 
3. Ujjain (in Madhya Pradesh), on the banks of Ksipra river, and 
4. Nasik (in Maharashtra) on the banks of Godavari river. 

The pilgrimage occurs four times every twelve years, once at each of the four locations. Each twelve-year cycle includes the Maha (great) Kumbh Mela at Prayag, attended by millions of people, making it the largest pilgrimage gathering around the world.