It translates to:
The brothers of the father are ___
1. El tío - The uncle
2. El primo - The cousin
3. Los tíos - The uncles
4. Los primos - The cousins
We know that the brothers of our fathers are our uncles so 2 and 4 can be marked out.
The sentence is plural so you would choose the plural word.
Answer: 3. Los tíos
Also.
The sentence in Spanish should be:
Los hermanos del padre son los tíos.
Not sure why “es” is there instead of “son.”