What should I do after class 12th in science stream?

Yes it is possible to apply for Nursing without PCB in Class 12 but your options are limited to Diploma courses like ANM course.

But you need to clear Class 12 for BSc Nursing.

No, a gap year after Class 12th won't affect your admission to any private Nursing college in Uttar Pradesh. The only requirement for B.Sc. Nursing requires a candidate to have passed Class 12 from any recognised board with a minimum mark of 45% in PCB together and passed in English individually.

Yes, you can apply to private Nursing colleges in Uttar Pradesh before your Class 12th result is declared. If a student has yet to get their 12th marks, they may choose the option “appearing” for that particular class before filling the application form. However, the candidate has to update his/her

No, if you have any gap after Class 12, it will not affect admission to Jindal School of Banking and Finance BCom. The institute has not said anything about having a gap in academics. Students just have 50% marks in Class 12 and a valid score in the accepted entrance test. 

Yes, you can start the brochure and application process for BE at East West College of Engineering while waiting for your results. You can send the required demand draft and register your details with the college in advance. This shows the college that you are a serious candidate for the engineering