The correct option is B Mixed farming
Mixed farming is a system of farming in which a farmer conducts
different types of agricultural practices together, on a single farm in
view of increasing his income through different sources. In mixed
farming a farmer can take up different types of practices for income
generation while doing his main business of agriculture. Some of these
practices that can be done together with the main agricultural practices
are - poultry farming diary farming, bee keeping. So, the correct answer is 'Mixed farming'.