Concept:Each letter is assigned its position in the English alphabet (A=1, B=2, etc.). The given result is the product of the positions of the two letters.Explanation:For AB,A=1andB=2,so1 \times 2 = 2.<br>ForCD, C=3 and D=4, so 3×4=12.For HI,H=8andI=9,so8 \times 9 = 72.<br>NowfindDF:D=4andF=6.Multiplythem:4 \times 6 = 24$.Answer:24 (Option A)