a arts student can apply for Diploma in computer science.
Hello student diploma in computer science is a 10+2 level course the duration of which is 3 years. Candidates can get into diploma after completing class 10. Admission is based on the basis of marks obtained in class 10/ entrance examination.
Admission is not based on class 12 so no matter if you're 12 passed from which stream.
Feel free to comment if you've any doubt
Good luck