Akash leaves home for school which is 12 km from his house. After the school, he goes to his club which is 7 km from his school. if his house, school and club all fall in a line, then what is the minimum distance he has to travel to get back home? `5\ \ k m` b. `12\ k m` c. `19\ k m` d. `7\ k m` e. `17\ k m`