BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:
@booklet{EasyChair:3076,
author = {Prasanta Das and Biplab Das and Himadri Sekhar Dutta},
title = {Prediction of Lungs Cancer Using Machine Learning},
howpublished = {EasyChair Preprint 3076},
year = {EasyChair, 2020}}