2131: The working principle of a washing machine is
(a) centrifugation
(b) dialysis
(c) reverse osmosis
(d) diffusion
2132: The sufi saint who maintained that devotional music was one way of coming close to God was
(a) Muin-ud-din Chishti
(b) Baba Farid
(c) Saiyid Muhammad Gesudaraz
(d) Shah Alam Bukhari
2133: The Speaker of the lower house of a State can step down by submitting his resignation to the:
(a) Chief Minister
(b) Governor
(c) Deputy Speaker of the House
(d) President
2134: 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
2135: With reference to the invaders in ancient India, which one of the following is the correct chronological order ?
(a) Greeks - Sakas - Kushans
(b) Greeks - Kushans - Sakas
(c) Sakas - Greeks - Kushans
(d) Sakas - Kushans - Greeks