hi,

see one can not apply for two reservation category simultaneously. you have to select only one category let it be ews, general or obc ncl. now see ews category has 10% seats reservation,  Non Creamy Layer of Other Backward Classes (OBC-NCL) reservation has 27% of seats. so obc ncl has larger percentage compare to ews. however the chances of securing seats also depends on number of applicants, questions difficulty level, seat matrix etc.

hope it would help.

if you have attempted for jee main February session you may apply for careers360 college predictor tool to know about probable college name based on your score :

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer