What is the rank of Journal of Combinatorial Theory Series B?

What is the rank of Journal of Combinatorial Theory Series B? - (JCoSB) The Journal of Combinatorial Theory publishes original mathematical research dealing with theoretical aspects of the study of discrete structures. Series B is concerned primarily with the theory of graphs and hypergraphs as well as matroids, and is a valuable resource for mathematicians and computer scientists. As one of the premier journals in these areas, the journal sets very high standards for publication. Manuscripts accepted by the journal are generally expected to solve or make an important step towards a solution of an more...