4556: The Vitamin containing cobalt is
(a) B1
(b) B2
(c) B6
(d) B12
4557: The Congress ministries resigned in the seven provinces in 1939, because
(a) the Congress could not form ministries in the other four provinces
(b) emergence of a left wing in the Congress made the working of the ministries impossible
(c) there were widespread communal disturbances in their provinces
(d) None of the statements (a), (b) and (c) given above is correct
4558: Which organelle in the cell, other than nucleus, contains DNA ?
(a) Centriole
(b) Golgi apparatus
(c) Lysosome
(d) Mitochondrion
4559: An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth
(a) Does not exist at such distance.
(b) Is neutralized by the attraction of the moon.
(c) Provides the necessary speed for its steady motion.
(d) Provides the necessary acceleration for its motion.
4560: Weights of two pieces, one of gold and one of silver each weighing 100 gm were recorded on a spring balance. Then they were fully immersed in a liquid bath, by letting them hang through a light thread tied to the balance. Compare the recorded weights of the two pieces under that condition. Then
(a) The gold piece will weigh more than the silver piece
(b) The silver piece will weigh more than the gold piece
(c) The weights of the two pieces will be equal
(d) Nothing can be said without knowing the density of the liquid bath