The top 5% of people from any academic category will be preferred when giving a call provided that they have cleared the various criteria. They include:
Primary sectionals
Overall CAT cutoff
scored above the specified percentage in 10th and 12th
scored above the 80th percentile graduation score
If you have cleared all these criteria then you will be among the eligible candidates. But IIM Ahmedabad calls only 5% of the top composite score holders. For example, if there are 100 general candidates then it will call only the top 5 composite score holders. If there are 2000 general candidates it will call only 100 top composite score holders. But the maximum number of calls made will never exceed 100.