Which one among the following is incorrect about fertilisers? (i) A fertiliser is a salt or an organic compound. (ii) A fertiliser is obtained by the decomposition of animal wastes and plant residues. (iii) A fertiliser provide a lot of humus to the soil. (iv) Most of the fertilisers are soluble in water.

• A. (i) and (ii)                      
• B. (ii) and (iii)
• C. (iii) and (iv)                   
• D. (i) and (iv)
• E. None of these