Question

either my brother or my father _responsible.

Answer 1

$\huge\bold\red{HeyThere!}$

Either my brother or my father $<b><u>is</b></u>$ responsible.

$\huge\bf\mathbb\purple{Thanks!}$

Answer 2

Hey mate here is your answer.....

Either my brother or my father 'is' responsible.

Hope this helps....