I've been booked by our company travel-secretary on a Star Alliance RTW business-class ticket going amongst others FRA-SIN on SQ. The booking-class for SQ on the FRA-SIN leg is A. What does this mean?

Please help as I need to make sure the secretary has not made a mistake and put me in seats reserved for those with hearing impediments so they're right next to the galley and toilets in coach...

Please accept my apologies if this is not the right thread for this question.

Flying Viking