Solution:

The answer to the question is option 'B' i.e. 6.

Explanation:

To find out how many brothers the barber had, we need to count the number of brothers he had. Let us assume that the barber's family consisted of his parents and siblings.

To count the number of brothers, we need to subtract the barber and his sisters from the total number of siblings.

Let the total number of siblings be 'x'.

The equation can be written as x = barber + sisters + brothers

We know that the barber is a male, so he cannot be counted as one of his sisters.

Hence, x = barber + (number of sisters) + (number of brothers)

We also know that the total number of siblings includes the barber.

Therefore, x = (number of brothers) + (number of sisters) + 1

From the given options, we can try to substitute the values of x and see which option satisfies the equation.

Option A: If the number of brothers is 5, then the equation becomes x = 5 + (number of sisters) + 1. This can be simplified as x = (number of sisters) + 6. This option cannot be the answer as we cannot determine the value of x.

Option B: If the number of brothers is 6, then the equation becomes x = 6 + (number of sisters) + 1. This can be simplified as x = (number of sisters) + 7. This option satisfies the equation, and hence, the answer is option 'B'.

Option C: If the number of brothers is 7, then the equation becomes x = 7 + (number of sisters) + 1. This can be simplified as x = (number of sisters) + 8. This option cannot be the answer as we cannot determine the value of x.

Option D: If the number of brothers is 8, then the equation becomes x = 8 + (number of sisters) + 1. This can be simplified as x = (number of sisters) + 9. This option cannot be the answer as we cannot determine the value of x.

Therefore, the correct answer is option 'B' i.e. 6.

Barber has 6 brother.