The names of top French Business School or Institutes as your friend want to take admission in it are as follows:

INSEAD Business School

Hautes Etudes Commerciales School of Management

Grenoble Ecole de Management

Essec International Business School Paris Singapore

Reims Management School

Emlyon Business School

Groupe Ecole Superieure de Commerce Tolousse - Tolouse Business School

Bem Management School Bordeaux

Chamber of Comerce Ecole Superieure de Commerce Sophia Antipolis
Ceram Business School

ESCEM School of Business and Management Tours-Poitiers

Groupe Ecole Management ESC Rouen

Ecole de Management de Normandie Ecole de Commerce

Audencia Nantes Ecole de Management

Groupe Ecole Superieure de Commerce La Rochelle

Essca Ecole de Commerce Ecole Post-Bac Gestion Management

École de Management Strasbourg

International Graduate School of Management of Dijon

Groupe Ecole Superieure de Commerce Clermont Graduate School of
Management

IESEG School of Management à Lille

Euromed Marseille Ecole de Management

Groupe ICN Ecole de Management Icn Business School

Groupe Ecole Superieure de Commerce de Lille School of Management

Groupe Ecole Supérieure de Commerce de Pau