8/9÷3/4=8/9x4/3=32/27.
Options: (a) 8/4×9/3=2×3=6 (b) 8/9×3/4=2/3 (c) 9/8×4/3=3/2 (d) 9/8×3/4=27/32.
No options apply. The first operand stays the same: 8/9. The operand after ÷ is the only one to be inverted.
So (c) and (d) can be eliminated because the first operand has been inverted.
The nearest of (a) or (b) is (b) which should have been 8/9×4/3; or the question should have been 8/9÷4/3 instead of 8/9÷3/4, so that (b) would have been correct.