The IUPAC name of the following compound is
`HOOC - CH_(2)-underset(COOH)underset(|)(CH)-CH_(2)-CH_(2)-COOH`
A. 2-(carboxy methyl)-pentane-1, 5-dioic acid
B. 3-carboxy hexane-1, 6 dioic acid
C. Butane , 1, 2, 4, -tricarboxylic acid
D. 4-carboxy hexane-1, 6 dioic acid