What line of code would produce this output: $[\text{'}1\text{'},2\text{'},3\text{'},\text{'}4\text{'}]?$

$\text{'}1,2,3,4\text{'}.$split$(\text{'}$

$\text{'}1,2,3,4\text{'}.$split$(\text{'},\text{'})$

$\text{'}1,2,3,4\text{'}.$reverse$(\text{'},\text{'})$

$\text{'}1,2,3,4\text{'}.$join$(\text{'},\text{'})$