Pick out the item which has sequential arrangement.
This is the sequence which is followed during the prophase I step of Meiosis I. For the division firstly condensation of chromosomes take place, then pairing of homologous chromosomes take place, after that crossing over, then terminalisation take place and finally disappearance of nuclear membrane and nucleolus takes place.
Since, above mentioned steps are followed by sequence (iii).
Therefore, correct answer is (iii).
It can be better understood with the following picture:

Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.