4251: Why DDT is banned in western countries?
(a) It remains in environment for a long time
(b) The insects are immunised
(c) It is a highly poisonous insecticide
(d) None of the above
4252: The term Aryan denotes
(a) an ethnic group
(b) a nomadic people
(c) a speech group
(d) a superior race
4253: In Mughal paintings one notices the adoption of principle of foreshortening whereby near and distant people and things could be placed in perspective. This was due to the influence of the
(a) British
(b) Dutch
(c) Portuguese
(d) Danish
4254: The Directive Principles of State Policy have been given precedence over Fundamental Rights in the ___ Constitutional Amendment.
(a) 41st
(b) 42nd
(c) 43rd
(d) 45th
4255: Nobel Prize winning scientist James D. Watson is known for his work in which area ?
(a) Metallurgy
(b) Genetics
(c) Environmental protection
(d) Meteorology