which study is best for interior designer 1. AFTER 10th class diploma in interior designer 2. B.SC in interior designer 3. bachelor of interior designer

Hello,
For pursuing interior design after class 10th, a student cannot go for Bachelors degree programmes or Masters degree programmes as they require a minimum qualification of class 12th and graduation respectively. Also, job opportunities for diploma in Interior Design is very less.
So, if you want to further go for a bachelor's degree after your Diploma course you first need to complete your 11th and 12th. So I would suggest you to first complete your class 12th then go for Bachelors in Interior Design.
Bachelors In Interior Design is a r years undergraduate course. The program has been designed to offer to eligible students specialization in a wide range of concepts and techniques involved in organizing, managing, and planning the interiors of residences and buildings, by understanding peoples behavior and needs.

B.Sc Interior Design is a 3 year undergraduate course which educate students with concepts of planning, designing, organizing and managing a space according to its function. The course includes detailed study about principles and elements of design.

Hope it helps