Which is an incorrect sentence?

• ক If by any chance you can manage dinner tonight, perhaps we can at least have a drink together.
• খ If they has tried to stop the protest, there would have been a riot.
• গ If Dad was here, he would know what to do. ✅ সঠিক উত্তর
• ঘ I usually make a sandwich to take to work if I have enough time.