The correct option is C 1,13,48,980
The first comma comes after hundreds place (i.e 3 digits from right), second comma comes two digits later (i.e 5 digits from right), third comma comes after two more digits (i.e 7 digits from right) and so on.
So, after inserting commas,11348980 can be written as 1,13,48,980 in the Indian numeral system.