cat desk Are all the three sentences correct? Did you read your own link? The answer to your question is explained there: 'What' and 'which' are interchangeable in your example, Telma.
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cat deskAre all the three sentences correct?
Did you read your own link? The answer to your question is explained there:
'What' and 'which' are interchangeable in your example, Telma. Both 'what' and 'which' would fit in both places with little or no difference in meaning.
As to style, consistency would be better.