Go through the following statements (i) The most widely used compound as source of ethylene is ethephon. (ii) Ethylene helps the plants to increa their absorption surface by promotin root growth and root hair formation. (iii) 2, 4 - D is mainly used to kill mature monocotyledonous plants. (iv) Spraying juvenile conifers with GAs has- tens the maturity period, thus leading to early seed production. Which of these are correctA. (i) & (iv)B. (i), (ii) & (iv)C. (i), (iii) & (iv)D. (ii), (iii) & (iv)