491: Azolla gives a good biofertilizer when mixed with:

(a) Blue-green algae

(b) Cow dung

(c) Bone-meal

(d) Urea
492: Musical instrument used by Amir Khusro was:

(a) Sitar

(b) Sarod

(c) Tabla

(d) Flute
493: Match List I with List II and select the correct answer by using the codes given below the lists :

List I---------List II

I. Butler Committee Report--------- (A) Jallianwala Bagh Massacre

II. Hurtog Committee Report---------(B) Relationship between the Indian States and Paramount Power

III. Hunter Inquiry Committee Report----(C) Working of Dyarchy as laid down in the Montague-Chelmsford Reforms

IV. Muddiman Committee Report---------(D) The growth of education in British India and potentialities of its further progress

Codes:

(a) I-C, II-B, III-A, IV-D
(b) I-A, II-D, III-B, IV-C
(c) I-B, II-A, III-C, IV-D
(d) I-B, II-D, III-A, IV-C
494: The beginning of urbanisation of the Ganges from the 6th century was mainly attributed to:

(a) Fertility of soil

(b) Trade improvement

(c) Population growth

(d) None of the above
495: Which one of the following companies is associated with the exploration and commercial production of oil in Barmer-Sanchore basin of Rajasthan?

(a) Cairn Energy
(b) ONGC
(c) Reliance Energy Ventures
(d) Reliance Energy Ventures