Which of the following characteristics are common to both wind and water pollinated flowers? (i) Pollen grains are long and ribbon-like. (ii) Stigma is large and feathery. (iii) The flowers are not colourful. (iv) The flowers do not produce nectar.

• A. (i) and (ii) only
• B. (iii) and (iv) only
• C.  (ii) and (iii) only
• D.  (i) and (iv) only