As you consider various options for your higher education, it is important to carefully evaluate and compare different colleges and universities. Poornima University is the best to study for a B.Arch among the three universities: Dr. K.N. Modi University, Poornima University and LPU. 

• All three universities are private and have their own curriculum.
• It is important to consider if the curriculum is industry-aligned, and Poornima University has an updated and industry-aligned curriculum.
• Cost of education is an important factor to consider, and Poornima University offers an affordable education compared to LPU and KN Modi.
• Poornima University's education system is intellectually designed, and the faculty is knowledgeable, helpful, and generous.
• Poornima University provides top-notch learning opportunities.

You should do your own research and make an informed decision based on your individual goals and circumstances.