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UPPSC Prelims 2019GS-IQ. 138 of 219
Q. 1381 markMedium
UPPSC Prelims 2019·GS-I
Black-hole is (a) a flight recorder in aeroplane (b) a spot on the sun (c) a place in Antarctica (d) a collapsed star
(a)a flight recorder in aeroplane
(b)a spot on the sun
(c)a place in Antarctica
(d)a collapsed star