Starting row of laminate flooring
Option B is a fine way to start, if possible check 2 things. If possible shift your row if you can to get a potential butt joint out of the doorway. It is always best to eliminate joints in the doorways since it is always a high traffic area.The elimination of the added piece in option 1 is the reason I did go for option 1.

Secondly, adjust how much you cut out of the start row to minimize the problem of having a really narrow strip to finish on the other side. A 1" strip can be glued onto the neighboring lap if need be, a 1/2" strip will be delicate but can handled with glue too. Just make sure you will finish well. you do need to leave a 1/2" room at all solid objects in the room to allow the floor to float within the room, it will move, it will expand and contract with seasonal, and changes in room humidity/conditioning.