the scope after passing biology in class 12 is diverse since it not only allows you the privilege of getting to pursue basic sciences like zoology, botany and advanced basic sciences like microbiology, biotechnology and pursue graduation, post graduation and doctor degrees on them which will not only help you to practice professorship in future but also recruits you as experts in various multinational corporations as well as research and development Wings of different government and private institutes which requires scholars on the aforesaid subjects
Yes you also do have the opportunity of pursuing Ayurveda or alternate medicine, physiotherapy, diploma in laboratory services critical care services and other paramedical courses with the degree in biology at your class 12 level
if you are asking about the career options after MBBS then of course you have the opportunity to pursue MS and MD degrees in surgical and medicinal specialities and for open branches like general medicine or general surgery after pursuing the MD or Ms degree respectively(alternatively you can also pursue a DNB degree which is now equivalent to a master degree) you can super specialised with the DM or MCH degree respectively
yes as per recent researches radiology and Dermatology have been shining well as MD subjects and psychiatry MD is also of flourishing branch apart from many students with a surgical neck opting for orthopedics MS and MS in obstetrics and gynaecology apart from general surgery MS which are the usual branches selected by students in NEET PG examination and DNB entrance examinations
in subjects like general medicine, general surgery and paediatric medicine you can also appear for Neet SS examination to pursue super speciality is like cardiology, neurology rheumatology, endocrinology in medicine paediatric cardiology, paediatric nephrology in paediatric medicine and gastrosurgery, oncosurgery, neurosurgery and other branches in general surgery further on
McAfee depends on your aptitude and if you want outdoor this practice with a mix of procedures cardiology in the form of MBBS, MD general medicine and DM cardiology is a very good option and many people choose that nowadays
Forest surgeon MS general surgery followed by MCH in city vs aus urosurgery  are in vogue.