4476: There are 6 persons A, B, C, D, E and F. they are to be seated in a row such that B never sits anywhere ahead of A, and C never sits anywhere ahead of B. In how many different ways can this be done?
(A) 120
(B) 72
(C) 60
(D) None
4477: The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
(a) The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out.
(b) The mangroves provide both food and medicines which people are in need of after any natural disaster.
(c) The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or Tsunami.
(d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots.
4478: Centre-State financial relations are looked after by the:
(a) Finance Commission
(b) Sarkaria Commission
(c) Ministry of Finance
(d) Planning Commission
4479: The silver coins issued by the Guptas were called
(a) rupaka
(b) karshapana
(c) dinara
(d) pana
4480: The term 'IndARC', sometimes seen in the news, is the name of
(a) an indigenously developed radar system inducted into Indian Defence
(b) India's satellite to provide services to the countries of Indian Ocean Rim
(c) a scientific establishment set up by India in Antarctic region
(d) Indias underwater observatory to scientifically study the Arctic region