Complete the sentence with the most suitable Phrasal Verb given:

My father had _____ a new hardware factory for my brother.

set up

The correct answer is Option (3) → set up

Here's why the other options wouldn't work:

• Set off: Implies to begin a journey or to trigger something. ("They set off on their adventure," "The fireworks set off a chain reaction").
• Set in: Refers to something becoming established or starting to happen. ("Winter has set in," "The sadness set in").
• Set out: Means to start a journey or to begin doing something deliberately. ("They set out to climb the mountain," "She set out to write a novel").

In this context, your father took steps to create the factory specifically for your brother, which aligns with the meaning of "set up."