Di-ammonium phosphate contains:

Correct option is A

The correct answer is (A) Nitrogen (18%) and Phosphorus (46%)

Explanation:
• DAP (Di-ammonium phosphate) is the world's most widely used phosphorus fertilizer.
• It is a complex fertilizer containing two primary nutrients: Nitrogen (N) and Phosphorus (P).
• The standard grade of DAP contains 18% Nitrogen and 46% Phosphorus ($P_2O_5$).
• The Nitrogen in DAP is in the ammoniacal form, and the Phosphorus is almost entirely water-soluble.

Information Booster:
• Urea: Contains 46% Nitrogen (Option B and C confuse these numbers).
• SSP (Single Super Phosphate): Contains 16% $P_2O_5$.
• MOP (Muriate of Potash): Contains 60% $K_2O$.

Additional Knowledge:
• Because DAP contains both N and P, it is highly efficient for basal application at the time of sowing. However, it should not be mixed with lime or high-calcium fertilizers as it can lead to nitrogen loss.