The correct option is A 5 years
The bar graph representation shows age in years on the horizontal axis, and the corresponding number of boys in that age group is depicted on the vertical axis.
The maximum number of boys, i.e., 60, are present in the age group of 10 years.
The second-largest number of boys, i.e., 50, are present in the age group of 5 years.
Hence, the required answer is 5 years.