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State Services Main Examination-2013- GS-1 (Exam Dt. 27 Oct 2013)
Three zones of varying propertie have been identified in the earth i.e. crust, mantle and core. (a) The area f change in idensity between sial and sima is known as Conrad discontinuity. (b) The area of sudden change in seismic waves velocity is known as Moho discontinuity. (c) The mantle - core boundary is determined by Gutenberg discontinuity. Which of the statements given above is/are correct ?
(a) only
(b) and (c) only
(a) and (c) only
(a), (b) and (c)
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