i m studying b phamacy 1st yr what examination code should i choose

In your case, your qualification code will be 02. Code 2 is for candidates who has completed their qualifying examination that is equiv. To +2 in your case with subjects like Physics, chemistry, biology or biotechnology. In your case, you have to apply for NEET on the basis of your 10+2 score, as B.pharma doesn't have the subjects required for NEET.