4116: With reference to agricultural soils, consider the following statements :
1. A high content of organic matter in soil drastically reduces its water holding capacity.
2. Soil does not play any role in the sulphur cycle.
3. Irrigation over a period of time can contribute to the salinization of some agricultural lands. Which of the statements given above is/are correct ?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
4117: When ten persons shake hands with one another, in how many ways is it possible ?
(A) 45
(B) 20
(C) 25
(D) 40
4118: Which of the following two continents are just like the mirror images of each other?
(a) South America and Africa
(b) South America and North America
(c) South America and Australia
(d) Europe and Asia
4119: Which one of the following Union Ministries implements the Cartagena Protocol on Biosafety?
(a) Ministries of Health and Family Welfare
(b) Ministries of science and technology
(c) Ministry of Environment and Forests
(d) Ministry of Chemicals and Fertilizers
4120: Recently, which one of the following was included in the UNESCO's World Heritage list?
(a) Dilwara Temple
(b) Kalka-Shimla Railway
(c) Bhiterkanika Mangrove Area
(d) Vishkhapatnam to Araku valley railway line