The graph shows the potential energy as a function of internuclear distance for molecular oxygen, O= O, and an unknown heteronuclear diatomic molecule, A-B.
Based on the data in the graph, which of the following correctly identifies the diatomic molecule A - B?
a. Bromine monofluoride, Br-F
b. Carbon monoxide, C-O
c. Sulfur monoxide, S-O
d. Iodine monochloride, I-CI