451: One consistent feature found in the history of southern India was the growth of small regional kingdoms rather than large empires because of
(a) the absence of minerals like iron
(b) too many divisions in the social structure
(c) the absence of vast areas of fertile land
(d) the scarcity of manpower
452: The technique used to transmit audio signals in television broadcasts is
(a) Amplitude Modulation
(b) Frequency Modulation
(c) Pulse Code Modulation
(d) Time Division Multiplexing
453: Swaraj Party was formed after the failure of:
(a) Quit India Movement
(b) Satyagraha Movement
(c) Non-cooperation Movement
(d) Civil Disobedience Movement
454: Assertion (A) :
Formic acid is a stronger acid than acetic acid.
Reason (R):
Formic acid is an organic acid.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is NOT a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
455: Which one of the following sculptures invariably used green schist as the medium ?
(a) Maurya sculptures
(b) Mathura sculptures
(c) Bharhut sculptures
(d) Gandhara sculptures.