Statement A: Casparian strips are impermeable to water and mineral ions.
Statement B: Casparian strips are made of cellulose.

Endodermis of root sometimes endodermis of dicot stem has casparian strips in its tangential and radial walls. Since these are made of hydrophobic substance Suberin, they do not allow the movement of water and mineral ions through it. They are not made of cellulose.