Answer: A) Biosphere Explanation: The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life is called Biosphere.

Answer: C) 5 Explanation: (3x + 2) (2x - 5) = ax2+kx+n ...............(1)   But (3x + 2)(2x - 5) = 6x2-11x-10........(2)   so by comparing (1) & (2),   we get a= 6, k= -11 , n= -10   (a - n + k) = 6 + 10 - 11 = 5.

Answer: D) a Explanation: a -  at the peak of changes in blood pressure indicates the systiolic pressure.

Answer: A) 4 Explanation: Let 1310 = x  => 3x = 10   Given that 125=3   Therefore, 52x = 10    => x = 10/3 = 4.

Answer: C) Rangana Herath Explanation:

Answer: B) A Needle Explanation: What has one eye yet cannot see is An Eye of a Needle.   A needle has an eye through which we thread it but it is not for seeing.

Answer: B) Chambal Explanation: The Gandhi Sagar Dam is built on Chambal river and is located in the Mandsaur & Neemuch district of Madhya Pradesh.   The dam’s reservoir area is the second-largest in India (after the Hirakud Reservoir), and attracts a large number of migratory and non-migratory birds throughout the year.   It is a masonry gravity dam, standing 62.17 metres (204.0 ft) high.

Answer: D) All the above Explanation: Metamorphism is the change of minerals or geologic texture in pre-existing rocks, without the protolith melting into liquid magma. The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids.   The parent rock must be in solid form. Tons of pressure must be applied for metamorphism to happen. The process must take place underground.