4500 cm3 + 7500 cc + 250 DL + 0,75 M3 = ... liter

= 4500 cm3 + 7500 cc + 250 dl + 0,75 m3
= ( 4,5 liter + 7,5 liter ) + 25 liter + 750 liter
= ( 12 + 25 ) + 750
= 37 + 750
= 787 liter
Jadi, Jawabannya B. 787