The correct option is B 11.2 litres of H2 at STP is produced for every mole of HCl (aq) used.
From the balanced chemical reaction, it can be seen that 6 moles of HCl produce 3 moles of hydrogen. Hence, 1 mole of HCl will produce 0.5 moles of hydrogen which will occupy volume of 11.2 L at STP. Thus, the option A is correct and the option B is incorrect.
1 mole of Al will produce 1.5 moles of hydrogen which will occupy a volume of 33.6 L under STP conditions only. Hence, the options C and D are incorrect.