Hello sir, 

First of all congratulation for your son  for performing well in the exams. The best colleges for CSE with emcet rank of 9.5 k are:

• JNTU
• Osmania University of college and engg
• Vaisavi college 
• Vignan jyoti institute of technology 
• Andhra University 
• GITAM
• GMRIT
• KL college
• Gayathri vidya parishad (GVP)

These are the colleges. 

I hope you will find my answer helpful. 

All the best.