Forward by 1s. Write the missing numbers.
Count

The correct answer is: 2, 6, 10, 14, 18, 19

In the question there is a table of numbers which have some missing numbers on it.
We have to find the missing numbers on the table.
Firstly, on counting forward by 1s after 1 we get 2.
Similarly, on counting forward by 1s after 5 we get 6.
Again, on counting forward by 1s after 9 we get 10.
Again, on counting forward by 1s after 13 we get 14.
Again, on counting forward by 1s after 17 we get 18.
Again, on counting forward by 1s after 18 we get 19.
So, the missing numbers are  2, 6, 10, 14, 18, 19.
Therefore, the correct option is c, i.e., 2, 6, 10, 14, 18, 19.