The structure for PGF
2β is shown. What structural feature is represented by 2β In the name of this compound?
![](data:image/png;base64, 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)
◦ β represents the
trans relationship between the two OH groups
◦ 2 represents the number of double bonds
◦ β represents the
trans relationship between the side chains
◦ A and C
◦ A and B