All of the job titles listed can involve the use of math to varying degrees. However, if we consider which title might not be primarily focused on math, the most fitting answer would be:
C. geneticist
While geneticists do use math in their work (especially in areas like statistical analysis or modeling), their primary focus is on biology and genetics rather than mathematics itself. In contrast, architects, drafters, and statisticians typically have more direct applications and foundations in mathematical principles.