Does the Sigma Ex Apo 70-200Mm 1:2.8D F/2.8 focus on the Nikon D5100?

Does the Sigma Ex Apo 70-200Mm 1:2.8D F/2.8 focus on the Nikon D5100?
Added (1). I am wondering if I need to focus manually or if it will auto focus many thanks

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