This is my code

$form['option_city'] = array(
        '#type' => 'radios',
        '#title' => t('City'),
        '#description' => t('Reservation'),
        '#options' => array(
        t('City'),
        t('Address'),
        ),
        '#default_value' => variable_get('option_city', 0) // default to Never
    );

When i select " City " Display the Cityform

When i select " Address " Display the AddressForm

How to write the code for this situation

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B.S.Bharanikumar

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