a. Should be from 13.
b. I can only show you the proviso in Section 60F of the Employment Act. I think if the Dr certified to be hospitalisation although not stayed in hospital, it is hospitalisation. If you are still in doubt, consult the Labour Office.
"And provided further that if an employee is certified by such registered medical practitioner or medical officer to be ill enough to need to be hospitalised but is not hospitalised for any reason whatsoever, the employee shall be deemed to be hospitalised for the purposes of this section."