In the Indian system of numeration, the number 7,89,21,092 is written as:
Options
Seven crore eighty-nine lakh twenty-one thousand ninety-two
Seventy-eight million nine hundred twenty-one thousand ninety-two
Seven hundred eighty-nine lakh two thousand one hundred ninety-two
Seventy-eight crore nine lakh twenty-one thousand ninety-two
Explanation
In the Indian system, numbers are grouped into periods like ones, thousands, lakhs, and crores. The number 7,89,21,092 is read by first placing commas according to the Indian system (after 3 digits from the right, then every 2 digits). So, it's 7 (crore), 89 (lakh), 21 (thousand), 092 (ninety-two). Therefore, it is 'Seven crore eighty-nine lakh twenty-one thousand ninety-two'. Option B describes the International system (78,921,092). Options C and D misrepresent the place values.