A) when the particle re-enters region 1 through the longest possible path in region 2 the magnitude of the change in its linear momentum between point P1 and the farthest point from Y-axis is p√2
B) For B=813pQR , the particle will enter region 3 through the point P2 on X-axis
C) For B>23pQR , the particle will re enter region 1
D) For a fixed B, particles of same range Q and same velocity v, the distance between the point P1 , and the point of re entry into region 1 is inversely proportional to the mass of the particle