What is the result of the following operation $\text{'}1,2,3,4\text{'}.$split$(\text{'},\text{'})$

$\text{'}1\text{'},\text{'}2\text{'},\text{'}3\text{'},\text{'}4\text{'}$

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

$[\text{'}1\text{'},\text{'}2\text{'},\text{'}3\text{'},\text{'}4\text{'}]$

$\text{'}1234\text{'}$