3961: There are two identical red, two identical black and two identical white balls. In how many different ways can the balls be placed in the cells (each cell to contain one ball) shown below such that balls of the same colour do not occupy any two consecutive cells?
(a) 15
(b) 18
(c) 24
(d) 30
3962: His principal forte was social and religious reform. He relied Upon legislation to do away with social ills and worked unceasingly for the eradication of child marriage, the purdah system. To encourage consideration of social problems on a national scale, he inaugurated the Indian National Social Conference, which for many years met for its annual sessions alongside the Indian National Congress. The reference in this passage is to
(a) Ishwar Chandra Vidyasagar
(b) Behramji Merwanji Malabari
(c) Mahadev Govind Ranade
(d) B. R. Ambedkar
3963: Two trains, each being 120 metres long, are running on parallel tracks in opposite directions at 40 metres/minute and 20 metres/minute respectively. How much time will they take to cross each other?
(a) 1 minute
(b) 2 minutes
(c) 3 minutes
(d) 4 minutes
3964: Wangari Maathai, the Nobel Prizes winner from Kenya is known for her contribution to which one of the following ?
(a) Child development
(b) Journalism
(c) Sustainable development
(d) International economics
3965: Who evolved the national consciousness as a formal concept?
(a) B.G. Tilak
(b) Mahatma Gandhi
(c) Jawaharlal Nehru
(d) Surendranath Bannerjee