Explanation:
hmmm, what is meant by "3 times larger" ?
the area of the rectangle is 3 times larger ? that would be the normal understanding.
or the side lengths are 3 times larger ? which would make the area 9 (3×3) times larger.
for the first possibility :
area of B is 4 cm × 6 cm = 24 cm²
A is 3 times larger would mean
area of A = 3×24 = 72 cm²
for the second possibility :
A is 3 times larger would mean it side lengths would be
3×4 = 12 cm
and
3×6 = 18 cm
area of A = 12×18 = 216 cm²
or short
area of A is 9 times area of B = 9×24 = 216 cm²
as both (72 and 216) are in the list of answer possibilities, I would say that the extra info (that both rectangular are similar) indicates that the question was aiming for the second possibility.
so, A, 216 cm² is then the right answer.