Write SQL query to solve given problem: Show the id of the game platform with the most sales in region 2.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.game_platform_id FROM ( SELECT T.game_platform_id, SUM(T.num_sales) FROM region_sales AS T WHERE T.region_id = 2 GROUP BY T.game_platform_id ORDER BY SUM(T.num_sales) DESC LIMIT 1 ) T1