4061: Biological Oxygen Demand (BOD) is a standard criterion for
(a) Measuring oxygen levels in blood
(b) Computing oxygen levels in forest ecosystems
(c) Pollution assay in aquatic ecosystems
(d) Assessing oxygen levels in high altitude regions
4062: The average of X1, X2 and X3 is 14. Twice the sum of X2 and X3 is 30. What is the value of X1 ?
(a) 20
(b) 27
(c) 16
(d) 12
4063: Which among the following pairs of places have most marked difference in total rainfall per annum even though located approximately along the same latitude?
(a) Bangalore and Madras
(b) Bombay and Visakhapatnam
(c) Ajmer and Shillong
(d) Nagpur and Calcutta
4064: Swadeshi movement started during:
(a) Anti Bengal partition movement
(b) Non-Cooperation Movement
(c) Civil Disobedience Movement
(d) None of the above
4065: Consider the following statements:
Among the Indian States
1. Andhra Pradesh has the longest coastline.
2. Gujarat has the highest number of airports.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2