Concept:The pattern is: multiply the first and third numbers in a row, then add 3 to get the middle number.Explanation:For row 1: 5 × 3 = 15, then 15 + 3 = 18.For row 2: 9 × 7 = 63, then 63 + 3 = 66.For row 3: 11 × ? = unknown. We know the result is 58. So, 11 × ? + 3 = 58.Subtract 3: 11 × ? = 55. Divide by 11: ? = 5.Answer:The missing number is 5. Hence, the correct answer is option C.