രണ്ടു സംഖ്യകളുടെ തുക 10ഉം ഗുണനഫലം ഇരുപതും ആയാൽ അവയുടെ വ്യുൽക്രമങ്ങളുടെ തുക എത്ര ?
A2
B200
C1/2
D1/200
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