Which of the following statements will retrieve the text of aLabel called lblFirstName and place it in a string variablecalled str?string str = lblFirstName.Selection();string str = lblFirstName.Text;string str = lblFirstName.getText();string str = lblFirstName.SelectedItem;Often multiple _____ objects are placed together on a Panel or_____ control. The user can only select one of them.CheckBox TextBoxListBox GroupBoxRadioButton GroupBoxTextBox ListBox