Arrange the following events of meiosis in correct sequence.
I. Exchange of genetic material between homologous chromosomes.
II. Separation of sister chromatids.
III. Formation of synaptonemal complex.
IV. Total disappearance of chiasmata.

• A

  III, I, IV, II 

• B

  I, III, IV, II  

• C

  III, I, II, IV  

• D

  III, IV, I, II