An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts with chlorine gas a poisonous gas (E) is evolve. This gas with ammonia gives an organic compound (F). Which of the following are true.
A. The compound A = `H_(2)C_(2)O_(4)`
B. The compound D is neutral oxide
C. In the compound E the central atom undergo `sp^(2)` hybridization
D. The compound `F=NH_(2)CONH_(2)`