do i need to secure 50 marks individually in pcb to appear in neet?

The candidate must have passed in the subjects of Physics, Chemistry, Biology/Bio-technology and English individually and must have obtained a minimum of 50% marks taken together in Physics, Chemistry and Biology/ Bio-technology at the qualifying examination. For candidates belonging to Scheduled Caste/Scheduled Tribes or Other Backward Classes, the marks obtained in Physics, Chemistry and Biology/Bio-technology taken together in qualifying examination must be minimum 40% instead of 50% for General candidates.
You can even check the complete eligibility criteria below for the same:
NEET Eligibility Criteria

Good Luck.