What category of my I 140 is?

BC

Registered Users (C)
Hi, all. My attorney filed two I 140 petitions for me. He told me one was the first preference (alien with extraordinary ability),
   another one is the second preference (NIW). I got one approved. The notification only says: Sec.203 (b) (2) (Mem of Profession
   w/Adv Deg, or of Exceptn\'l Ability). I would appreciated if anybody tell me what category it should be? EB1 or EB2? Thanks!
 
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