Consider the following statements regarding the physiological roles of primary macronutrients (NPK) in plants: 1. Nitrogen is essential for vegetative growth and is a major component of chlorophyll and amino acids. 2. Phosphorus is primarily responsible for root development, flowering, and energy transfer via ATP. 3. Potassium regulates stomatal opening and closing and enhances disease resistance. Which of the statements given above are correct?

Options:

• A: 1 and 2 only
• B: 2 and 3 only
• C: 1 and 3 only
• D: 1, 2 and 3

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