2151: The production of cultured pearls is an important cottage industry of
(a) Belgium
(b) West Indies
(c) New Zealand
(d) Japan
2152: What does Baudhayan theorem (Baudltayan Sulva sutra) relate to ?
(a) Lengths of sides of a right-angled triangle
(b) Calculation of the value of pi
(c) Logarithm calculations
(d) Normal distribution curve
2153: 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
2154: Which of the following presents the most significant features of Indus Valley Civilisation?
(a) Buildings with perfect arches
(b) Use of burnt mud bricks
(c) Use of sun dried mud bricks
(d) None of these
2155: Which one of the following is used for dating archaeological specimens in wood, bones and shells?
(a) Uranium-238
(b) Argon isotope
(c) Carbon-14
(d) Strontium-90