Relatively newer agent latanoprost is now being used. Which of the following statements is true regarding this agent?
It is PGF2α derivative used in glaucoma
It is selective α1 blocker used in benign hypertrophy of prostate
It is a 5α reductase inhibitor used to reduce the size of enlarged prostate gland
It is a PGE2  analogue used intravaginally for cervical priming