UPSC IAS Prelims GS solved paper 1991

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Download previous year solved question paper of IAS Preliminary Exam General Studies 1991

1.Photons have properties similar to that of
(a) Waves
(b) Particles
© Both particles and waves
(d) Neither particles nor waves

2.The thermo regulatory centre of the man body is
(a) Pituitary
(b) Skin
© Hypothalamus
(d) Thyroid

3. When the Portuguese arrived in India, the foreigners whom they encountered as trade rivals were the
(a) Persians
(b) Arabs
© Dutch
(d) English

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