The correct answer is Hallmark Hallmark assures you to check the authenticity, purity and fineness of gold jewellery. <nis:link nis:type=tag nis:id=quizanswer nis:value=quizanswer nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=solution nis:value=solution nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=hallmark nis:value=hallmark nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=indianstandards nis:value=indianstandards nis:enabled=true nis:link/>