Examples of cover crops are
Centrosema pubescens and Mucuna utilis
Moringa oleifera and Imperata cylindrica
Panicum maximum and Pennisetum purpureum
Calopogonium mucunoides and Gliricidia sepium
Correct answer is A
Cover crops are plants that are primarily grown for the benefit of the soil rather than the crop yield. They are typically grown to suppress weeds, manage soil erosion, help build and improve soil fertility and quality, and control diseases and pests. Centrosema pubescens and Mucuna utilis are examples of cover crops. They are used to improve soil fertility and control weeds.