4076: When iron rusts, the weight:
(a) Increases
(b) Decreases
(c) Remains the same
(d) First increases then decreases
4077: With reference to the period of extremist nationalist movement in India with its spirit of Swadeshi, which one of the following statements is not correct ?
(a) Laikat Hossain led the Muslim peasants of Barisal in their agitations
(b) In 1989, the scheme of national education was formulated by Satish Chandra Mukherjee
(c) The Bengal National College was founded in 1906 with Aurobindo as the Principal
(d) Tagore preached the cult of Atmasakti, the main plank of which was social and economic regeneration of the villages
4078: The type of crop which is able to fix nitrogen from air is known as:
(a) Tuber
(b) Coffee
(c) Legume
(d) Wheat
4079: The Himalayan Range is very rich in species diversity, Which one among the following is the most appropriate reason for this Phenomenon?
(a) It has a high rainfall that supports luxuriant vegetative growth
(b) It has less human interference
(c) Exotic and invasive species have riot been introduced in this region
(d) It is a confluence of different bio-geographical zones
4080: 'Broad-based Trade and Investment Agreement (BTIA)' is sometimes seen in the news in the context of negotiations held between India and
(a) European Union
(b) Gulf Cooperation Council
(c) Organization for Economic Cooperation and Development
(d) Shanghai Cooperation Organization