Number of significant figures in 13.023=5
Number of significant figures in 123.1=4
13.023×123.1=1603.1313
Using the rule of significant figures, number of significant figures in 1603.1313 should be 4. Hence we will round off 1603.1313 to 4 digits.
Hence, 13.023×123.1=1603
Therefore, option (C) is the right choice.