A text input box:

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Some radio buttons with Cat checked by default:
Dog Cat Mouse

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Some checkboxes with Power steering and Air conditioning selected by default:
Power steering Air conditioning Leather upholstery Automatic transmission

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Now a dropdown list box from which only one option can be selected, with Green selected by default:
Red Blue Green

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Now a dropdown list from which more than one option may be selected, with Small and Medium selected by default:
Small Medium Large

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