Hi Shirley,
yes, you can only choose A1 and B1. But B1 got 2 packages, premier or classic. For premier, Dr Han will help u to set drip etc but for classic, the dr will only come when you are about to delivered.
Not very sure about charges. See him at TPS last time, Around wks 32, the nurse will talk to you about the price and packages so that you can book your package but not sure how they do it in Ang Moi Kio. Maybe during your next visit, remind him that you have not booked your package yet. Then maybe dr han could ask someone to talk to you about the packages.
Take Care and enjoy your pregnancy....