546: A cube of side 2 units is placed in a rectangular coordinate system with its centre at the origin. The coordinates of a set of 4 non-adjacent corners is

(a) (1, 1, 1); (-1, -1, -1); (1, -1, -1);

(b) (1, 1, 1); (-1, 1, 1); (1, -1, 1); (1, 1, -1)

(c) (1, 1, 1); (-1, -1, -1); (-1, 1, 1); (1, -1,-1)

(d) (-1, -1, -1); (1, 1, -1);. (-1, 1, 1); (-1, 1, -1)
547: The 'Swadeshi' and 'Boycott' were adopted as methods of struggle for the first time during the

(a) agitation against the Partition of Bengal
(b) Home Rule Movement
(c) Non-Cooperation Movement
(d) visit of the Simon Commission to India
548: Federation, Indian responsibility, reservation and safeguards were the three lynchpins of

(a) Gandhi-lrwin Pact

(b) Macdonald Award

(c) Poona Pact

(d) Radcliffe Award
549: The sportsperson Soma Biswas is associated with

(a) Sailing
(b) Hockey
(c) Golf
(d) Athletics
550: In a family, a couple has a son and a daughter. The age of the father is three times that of his daughter and the age of the son is half of his mother. The wife is nine years younger to her husband and the brother is seven years older than his sister. What is the age of the mother ?

(a) 40 years
(b) 45 years
(c) 50 years
(d) 60 years