Which religion is most prevalent in Asia?
Most prevalent religion refers to the religion with the most population percentage
SELECT T4.Name FROM continent AS T1 INNER JOIN encompasses AS T2 ON T1.Name = T2.Continent INNER JOIN country AS T3 ON T3.Code = T2.Country INNER JOIN religion AS T4 ON T4.Country = T3.Code WHERE T1.Name = 'Asia' GROUP BY T4.Name ORDER BY SUM(T4.Percentage) DESC LIMIT 1