Match the substages of prophase I of first meiotic division listed in column I with the important events pertaining to respective stages given under column II.
Column I Substages of prophase I Column II Important eventsAZygotenepChromomeresBPachyteneqBivalents migrate to peripheryCDiplotenerTerminalization of chiasmata beginsDDiakinesissCrossing over tSynapsis
A = t, B = s, C = r, D = q