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

Which of the following definitions best describes '1,1'-lysobisphosphatidic acid'?

A. A 1,1'-lysobisphosphatidic acid in which both acyl groups are specified as oleoyl.
B. A lysobisphosphatidic acid carrying the fatty acyl groups at positions sn-3 and sn-3' of glycerol.
C. A lysobisphosphatidic acid carrying the fatty acyl groups at positions sn-2 and sn-2' of glycerol.
D. A lysobisphosphatidic acid with (R,R)-configuration in which both acyl groups are specified as oleoyl and are located at the 2 and 2'-positions.

Answer: A lysobisphosphatidic acid carrying the fatty acyl groups at positions sn-2 and sn-2' of glycerol.