Can the student doing 12th class apply for neet test?

Yes, a student in class 12th can apply for the NEET (National Eligibility cum Entrance Test) exam. However, they must have passed class 12th (or equivalent) with Physics, Chemistry, Biology/Biotechnology and English as core subjects before the results are declared. They can appear for the exam *while* in 12th standard, but they'll need to meet the eligibility criteria by the time admission processes begin.