निम्नलिखित में से किस तत्व को पौधों के लिए 'सूक्ष्म पोषक तत्व' (micronutrient) माना जाता है?

Which of the following elements present in soil is essential for healthy plant growth and development?

Which of the following organic compounds are primarily utilized for providing energy to plants?

A plant exhibits interveinal chlorosis exclusively on its youngest leaves while older leaves remain green. Which nutrient deficiency best explains this pattern, and what is its underlying biochemical basis?