Upon heating with acidic KMnO4 an organic compound produces hexan-1,6-dioic acid as the major product the starting compound is:
Compound A(C10H6) liberates 2 mole of CH4 when treated with MeMgBr. On heating with KMnO4 solution, “A” produces benzene dicarboxylic acid which on mononitration produces only one product and no other isomers. The compound “A” can be: