Select a row and display the column name based on max value in pyspark

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I have a Pyspark data frame as

| ID|colA|colB|colC|
+---+----+----+----+
|ID1|   3|   5|   6|
|ID2|   4|  12|   7|
|ID3|   2|  20|  22|
+---+----+----+----+


                      
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