В) 11/12+5/8

To solve the math problem, you need to find a common denominator for 12 and 8. The least common multiple of 12 and 8 is 24.

Now, let's convert the fractions to have a denominator of 24:

11/12 = (11 * 2)/(12 * 2) = 22/24

5/8 = (5 * 3)/(8 * 3) = 15/24

Now, we can add the fractions:

22/24 + 15/24 = (22 + 15)/24 = 37/24

However, this is an improper fraction. To convert it to a mixed number, divide the numerator by the denominator:

37 ÷ 24 = 1 remainder 13

Therefore, the final answer is 1 13/24.