The correct option is C Mottling and necrosis of leaves
Molybdenum is an essential micronutrient for plants. Molybdenum deficiency may induce symptoms similar to those of nitrogen deficiency, as molybdenum is required for the assimilation of nitrate taken up by the plant. Molybdenum is required for nitrate reduction. Mottling and necrosis of leaves are the most important deficiency symptoms.