$29.5\text{mg}$ of an organic compound containing nitrogen was digested according to Kjeldahl’s method and the evolved ammonia was absorbed in $20\text{mL}$ of $0.1\text{M HCl}$ solution. The excess of the acid required $15\text{mL}$ of $0.1\text{M NaOH}$ solution for complete neutralization. The percentage of nitrogen in the compound is:

1. A
   $59.0$
2. B
   $47.4$
3. C
   $23.7$
4. D
   $29.5$