The correct option is B Mn, Co, Mo
Essential elements in plants are divided into macronutrients and micronutrients. 9 elements (carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, potassium, calcium and magnesium) are macronutrients and 8 elements (iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel) are micronutrients. In addition to the 17 essential elements, 4
elements are beneficial (sodium, silicon, cobalt and selenium).