Which article of the Indian constitution define the fundamental duties of citizen

The popular Stockholm Earth summit was held in 

The shape of the mid-Atlantic Ridge is

Identify the oil field which is not located in the west coast of India

The Arabian sea branch of South West monsoon causes no rainfall to this region

The ratio of incomes of A and B is 5:4 and the ratio of their expenditure is 3:2. If at the end each month, each saves Rs. 1600, then the monthly income of B is