Which of the following options gives the correct sequence  of events during prophase-I of meiosis?

• A

   Leptotene $\to$Pachytene $\to$Zygotene $\to$Diplotene $\to$Diakinesis

• B

  Leptotene $\to$Zygotene $\to$Pachytene $\to$Diakinesis $\to$Diplotene 

• C

  Leptotene $\to$ Zygotene $\to$Diplotene $\to$Pachytene $\to$Diakinesis

• D

  Leptotene $\to$ Zygotene $\to$Pachytene $\to$Diplotene $\to$Diakinesis