Q. Decarboxylation of all six possible forms of diaminobenzoic acids $C _{6} H _{3}\left( NH _{2}\right)_{2} COOH$ yields three products $A , B$ and $C$. Three acids give a product ' $A$ ', two acids gives a product ' $B$ ' and one acid give a product ' $C$ '. The melting point of product ' $C$ ' is
Solution:
Correct answer is (d) $142^{\circ} C$
