156: Which one of the following Articles of the Indian Constitution provides that "It shall be the duty of the Union to protect every State against external aggression and internal disturbance"?
(a) Article 215
(b) Article 275
(c) Article 325
(d) Article 355
157: In an atom, the order of filling up of the orbitals is governed by
(a) Aufbau principle
(b) Heisenberg's uncertainty principle
(c) Hund's rule
(d) Pauli's exclusion principle
158: The title given by British Government to Mahatma Gandhi which, he surrendered during the Non-Cooperation Movement, was
(a) Hind Kesari
(b) Kaiser-e-Hind
(c) Rai Bahadur
(d) Rt.Honorable
159: A man purchases two clocks A and B at a total cost of Rs. 650. He sells A with 20% profit and B at a loss of 25% and gets the same selling price for both the clocks. What are the purchasing prices of A and B respectively ?
(a) Rs. 225; Rs. 425
(b) Rs. 250; Rs. 400
(c) Rs. 275; Rs. 375
(d) Rs. 300; Rs. 350
160: Insolation refers to:
(a) Restraining the flow of electric current
(b) Restraining the flow of water
(c) Exposure to the rays of sun
(d) Exposure to the light