4181: The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by
(a) a decrease in the supply of oxygen
(b) minor wear and tear of muscle fibres
(c) the depletion of glucose
(d) the accumulation of lactic acid
4182: Which of the following statements about 'Dinosaurs' is/are correct?
(a) The early man was a contemporary of Dinosaurs
(b) Man appeared first after the Dinosaurs became extinct
(c) The Dinosaurs became extinct about six million years before the appearance of the first man on the earth
(d) The Dinosaurs became extinct about 200 million years before the first man appeared on the earth
4183: Assertion (A)
Akbar introduced Din-i-Illahi which became more popular
Reason (R)
Din-i-Illahi was a religious order, suitable for the people of all religions
(a) if A and R both are correct and R is the correct explanation of A
(b) if A and R both are correct but R is not the correct explanation of A
(c) if A is incorrect but R is correct
(d) if A is correct but R is incorrect
4184: Cryogenic engines find applications in
(a) sub-marine propulsion
(b) frost-free refrigerators
(c) rocket technology
(d) researches in superconductivity
4185: A report says - The number of bus accidents is more than that of car accidents, the number of car accidents is less than the number of truck accidents, the number of truck accidents is less than the number of bus accidents. Which of the following conclusions do you draw from this report?
(a) There are more buses on road
(b) There are more trucks on the road
(c) Truck drivers are very careless
(d) None of these