Appearance of recombination nodules

The correct sequence of the events that take place during meiotic division
(I) Crossing-over
(II) Appearance of recombination nodules
(III) Terminalisation of chiasmata
(IV) Synaptonemal complex formation
(a) (II), (III), (IV), (I)
(b) (IV), (II), (I), (III)
(c) (I), (III), (II), (IV)
(d) (IV), (I), (III), (II)