In International System commas are introduced after every 3 digits starting from right to left side
In Indian System commas are introduced after 3 digits for one time and then after 2 digits starting from right to left side.
given the number 9849475825
International System:
9849475825=9,894,475,825
Indian System :
9849475825=9,84,94,75,825
So option B is correct