The correct option is A 16
The tape model is divided equally into 6 parts.
Among 6 parts, 3 parts are shaded that represents 12.
From the given expression, we have to divide 12 into 3 parts.
12 ÷ 3 = 12 × 13 = 16
Hence, each shaded part represents 16.
Therefore, the missing number is 16.