A) Fats
B) Proteins
C) Vitamins
D) Carbohydrates
Correct Answer: B
Solution :
Nitrogen is a major constituent of all proteins, and thus of all living organisms. The deficiency of nitrogen causes yellowing of older leaves, stunted plants, dormancy of lateral buds, purple coloration in shoot axis surface, wrinkling of cereal grains and inhibition of cell division.
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