Write SQL query to solve given problem: Give the NOC code and region name of the heaviest competitor.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.noc, T1.region_name FROM noc_region AS T1 INNER JOIN person_region AS T2 ON T1.id = T2.region_id INNER JOIN person AS T3 ON T2.person_id = T3.id ORDER BY T3.weight DESC LIMIT 1