Which of the following statement is correct about heart wood/duramen? (i) It does not help in water and mineral conduction. (ii) It is dark coloured but soft. (iii) It has treachery elements filled with tannins, resins, gums, oil, etc. (iv) It is a peripheral part. (v) They are sensitive to microbes and insects, hence least durable.

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