2671: Which one of the following agricultural practices is eco-friendly ?
(a) Organic farming
(b) Shifting cultivation
(c) Cultivation of high-yielding varieties
(d) Growing plants in glass-houses
2672: Which one among the following rivers is the longest?
(a) Lena
(b) Congo
(c) Amur
(d) Amazon
2673: Which of the following is not included in the assets of a commercial bank in India?
(a) Advances
(b) Deposits
(c) Investments
(d) Money at call and short notice
2674: The government holding in BPCL is
(a) More than 70%
(b) Between 60% and 70%
(c) Between 50% and 60%
(d) Less than 50%
2675: Who among the following discovered heavy water?
(a) Joseph Priestley
(b) Heinrich Hertz
(c) H. C. Urey
(d) G. Mendel