Option (B) Mixed farming is correct because mixed farming does not follow monoculture. According to the context, mixed farms grow multiple crops including wheat, barley, oats, rye, maize, fodder and root crops. Additionally, equal emphasis is laid on both crop cultivation and animal husbandry, with animals like cattle, sheep, pigs and poultry providing income along with crops. The practice also uses crop rotation and intercropping to maintain soil fertility. This diversity of crops and integration with livestock is the opposite of monoculture. In contrast, plantation agriculture and commercial grain farming typically focus on single crops, while dairy farming specializes in livestock.