A native of Venugopalapuram village in the Chittoor district of Andhra Pradesh, Theja has been studying at Sri Chaitanya Institute at Hyderabad's Madhapur for the last five years.
Vavilala Chidvilas Reddy from Nagarkurnool district of Telangana bagged the first rank. Nayakanti Naga Bhavya Sree, another Telugu student, is the topper among girls.
The 17-year-old, who attributed his success to his family, teachers and mentors, said he plans to take Computer Science at IIT Bombay and would later like to take up research.
V Chidvilas Reddy from Telangana, who secured the top rank in the IIT entrance exam JEE-Advanced, the results of which were announced on Sunday, said he expected to get a rank in the top 10 and was very happy to clinch All India Rank 1.