The correct option is
A 1= s, 2=r, 3=p, 4=q
Vascular Bundle of Monocot Stem is closed collateral and endarch, while in the monocot root the vascular bundle is radial, polyarch and exarch. Coming to dicots, in Soot, the vascular bundle is Closed collateral and endarch and in root it is Radial, tetrarch and exarch.