The correct option is D 996
To add these mixed fractions , first let’s convert them into improper fractions.
Converting 456 into improper fraction, (4×6)+56 = 24+56 = 296
Converting 1146 into improper fraction, (11×6)+46 = 66+46 = 706
Adding 296 + 706, we get
29+706 = 996 .
Therfore,option d is correct.