AMO 2027 Grades 4-5 SET 7 - Self-study Question 1

If numbers are arranged in 3 rows A, B and C according to the following table, which row will contain the number 1000?

A: 1, 6, 7, 12, 13, 18, 19, …

B: 2, 5, 8, 11, 14, 17, 20, …

C: 3, 4, 9, 10, 15, 16, 21, …