Which row shows part of the correct sequence of mitosis?
1 )
chromosomes condense $ \to $ chromosomes line up at the equator $ \to $ nuclear envelope disappears $ \to $ spindle fibres shorten
2 )
chromosomes line up at the equator $ \to $ spindle fibres shorten $ \to $ chromosomes condense $ \to $ nuclear envelope reappears
chromosomes line up at the equator $ \to $ spindle fibres shorten $ \to $ nuclear envelope reappears $ \to $ chromosomes uncoil
4 )
chromosomes uncoil $ \to $ nuclear envelope disappears $ \to $ spindle fibres shorten $ \to $ chromosomes line up at the equator
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