The correct answer is: d) Subsurface irrigation
Subsurface irrigation is a type of irrigation in which water is applied to the root zone of plants through pipes or tubing buried below the soil surface. This type of irrigation is commonly used for horticultural crops in Meghalaya because it is efficient and effective in conserving water.
Sprinkler irrigation is a type of irrigation in which water is sprayed onto the soil surface from above. This type of irrigation is not commonly used for horticultural crops in Meghalaya because it is not as efficient as subsurface irrigation in conserving water.
Flood irrigation is a type of irrigation in which water is applied to the soil surface in a sheet-like flow. This type of irrigation is not commonly used for horticultural crops in Meghalaya because it is not as efficient as subsurface irrigation in conserving water and it can lead to soil erosion.
Furrow irrigation is a type of irrigation in which water is applied to the soil surface in furrows between rows of plants. This type of irrigation is not commonly used for horticultural crops in Meghalaya because it is not as efficient as subsurface irrigation in conserving water and it can lead to soil erosion.