Indian Institute of Technology Patna (IIT Patna) is one of the premier engineering institutes in India, located in Patna, Bihar. It offers undergraduate, postgraduate, and doctoral programs in various fields of engineering, science, and technology. While all engineering branches offered by IIT Patna are equally good, here are some of the best engineering branches at IIT Patna based on various parameters:

1. Computer Science and Engineering (CSE): The CSE branch at IIT Patna is one of the most popular and sought-after branches. The faculty members of the CSE department are highly qualified and experienced in their respective fields. The department offers a comprehensive curriculum that covers various topics such as algorithms, data structures, artificial intelligence, machine learning, and computer networks. The department also has state-of-the-art facilities and research centers that allow students to gain hands-on experience and develop practical skills.
2. Electrical Engineering (EE): The EE branch at IIT Patna is another popular and highly-rated branch. The department has a team of experienced faculty members who are actively involved in research and development. The curriculum of the EE department covers a wide range of topics such as power systems, control systems, signal processing, and communication systems. The department also has well-equipped labs and research centers that provide students with practical exposure and research opportunities.
3. Mechanical Engineering (ME): The ME branch at IIT Patna is one of the oldest and most established branches. The department has a team of highly qualified faculty members who are well-versed in the latest developments and trends in the field of mechanical engineering. The curriculum of the ME department covers various topics such as manufacturing, design, materials science, and thermodynamics. The department also has well-equipped labs and workshops that provide students with hands-on experience and practical skills.
4. Civil and Environmental Engineering (CEE): The CEE branch at IIT Patna is another highly-rated and popular branch. The department has a team of highly experienced faculty members who are actively involved in research and development. The curriculum of the CEE department covers various topics such as structural engineering, geotechnical engineering, water resources engineering, and environmental engineering. The department also has well-equipped labs and research centers that provide students with practical exposure and research opportunities.

In conclusion, all engineering branches offered by IIT Patna are equally good, but the CSE, EE, ME, and CEE branches are some of the best based on various parameters. Students should choose the branch based on their interests, aptitude, and career goals. It is important to note that the best branch varies from person to person, and students should choose the branch that suits their interests and career goals the most.