Answer: A - Shiny
Explanation: Those elements can be classified as the metals which have free electrons and have a tendency to lose them . Thus s block elements have high metallic character in them due to the presence of an unpaired electron which can be easily lost to give a stable configuration.
Metals are shiny due to these unpaired or free electrons. When light falls on the metal , these free electrons vibrate producing there own light which reflects back to give them shiny and lustorous appearance.