4121: P is 300 km eastward of O and Q is 400 km north of O. R is exactly in the middle of Q and P. The distance between Q and R is
(a) 250 km
(b) 300 km
(c) 350 km
(d) 250 km multiply root 2
4122: "Black holes" refers to
(a) Holes occurring in heavenly bodies
(b) Bright spots on the sun
(c) Collapsing object of high density
(d) Collapsing object of low density
4123: Nine different letters are to be dropped in three different letter boxes. In how many different ways can this be done?
(a) 27
(b) 3^9
(c) 9^3
(d) 3^9 - 3
4124: The object of the Butler Committee of 1927 was to?
(a) Define the jurisdiction of the Central and Provincial Governments.
(b) Define the powers of the Secretary of State for India.
(c) Impose censorship on national press.
(d) Improve the relationship between the Government of India and the Indian States.
4125: Recently "oilzapper" was in the news, What is it?
(a) It is the latest technology to control the accidentally caused flames from oil wells
(b) It is an eco-friendly technology for the remediation of oily sludge and oil spills
(c) It is the latest technology developed for under-sea oil exploration
(d) It is a genetically engineered high biofuel-yielding maize variety