<prompt> In Brownes classification of placenta pre, the placenta covers the internal os when closed but not when fully dilated is:Type 1Type 2Type 3Type 4  <response>: Brownes classification for placenta pre: Type 1 lateral Placenta dipping into the lower segment but reached upto the os Type 2 marginal Placenta edge reached the internal os Type 3 The placenta covers the internal os when closed but not when fully dilated Type 4 The placenta covers the internal os even fully dilated 