In Engineering it depends on the interest of the student in which branch he wants to join. We have the following branches/courses in engineering:
Electronics and Computers Engineering(ECE)
Electronics and Electrical Engineering(EEE)
In first year all branches will have same subjects. You can ask your cousin's son in which branch he is interested , he can choose tat. Coming to colleges, if he is opting for management quota he can choose the best one if he want to go thru eamcet counselling then also he can choose the good college. In hyderabad we have main campus of Osmania Univeristy and JNTU apart frm these two colleges we have so many colleges in hyderabad.
Chaitanya Bharathi Institute of Technology(CBIT)
Vasavi College of Engineering(VCE)
Sreenidhi Institute of Technology
apart frm the above you have so many engineering colleges in and around hyderabad. Above colleges have good faculty, all practical labs, seperate buildings for each branch, Big library and good canteen.
Hope this information is useful to you