Which of the following statements is correct for $N_2O_4$?

An inorganic salt $(A)$ is decomposed at about $523 \ K$ to give products $(B)$ and $(C).$ Compound $(C)$ is a liquid at room temperature and is neutral to litmus paper,while oxide $(B)$ on burning with white phosphorus,gives a dehydrating agent $(D).$ Compounds $(A)$,$(B)$,$(C)$ and $(D)$ will be identified as:

In which of the following reactions,$NO_2$ is not liberated?

The oxoacid of phosphorus having the strongest reducing property is

Which of the following allotropes of phosphorus is the most stable?

In which of the following arrangements,the sequence is not strictly according to the property written against it?