Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'quinol sulfate(1-)'?

A. An organosulfonate oxoanion that is the conjugate base of quinol sulfate, obtained by deprotonation of the sulfo group; major species at pH 7.3.
B. An organosulfonate oxoanion obtained by deprotonation of the sulfo and hydroxyimino groups of 5-(hydroxyimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonic acid.
C. The penta-anion resulting from the removal of protons from each of the sulfonic acid groups of colistimethate A.
D. An organosulfonate oxoanion that is the tetraanionic form of trypan blue.

Answer: An organosulfonate oxoanion that is the conjugate base of quinol sulfate, obtained by deprotonation of the sulfo group; major species at pH 7.3.