Hi Lakshmi,

          I am here to help you with your question. It's been so long you posted your question but I just found it now and I am answering immediately. Coming to your question you mentioned your AP ICET rank is 424 which means your marks lie between 120-135. Based on my research you are able to apply for following B grade colleges:

Andhra University, Vishakapatnam

Velagapudi Ramakrishna Siddhartha Engineering College, Vijayawada

Dr.Lankapalli Bullayya College, Vishakapatnam

Annamacharya Institute of Technology and Science, Kadapa

Lakireddy Balireddy College of Engineering college, Krishna

I hope this will be helpful to you.

All the best.

Thank you.