Final answer:
The Parisian designer who launched her first perfume and introduced her legendary suit in the 1920s is Coco Chanel, known for Chanel No. 5 and her iconic suits.
Step-by-step explanation:
The Parisian designer who launched her first perfume and introduced her legendary suit in the 1920s is a) Coco Chanel. Coco Chanel was a revolutionary figure in the fashion industry, known for her timeless designs and the famous Chanel No. 5 perfume, which debuted in 1921. Her influence extends beyond her iconic suits and perfumes, as she also helped liberate women from the restrictive fashions of the time by promoting a sporty, casual chic as the feminine standard.