See if have to zero down your choice because working on both things is not fruitful as you cannot pursue higher studies on both divisons.
Here iam elaborating some career options if you take biology as your main subject in 11 and 12th 
To begin with, here is an exhaustive list of all the options available to you:

MBBS  Bachelor of Medicine and Bachelor of Surgery

BHMS  Bachelor of Homeopathy Medicine and Surgery

BAMS  Bachelor of Ayurvedic Medicine and Surgery

BUMS  Bachelor of Unani Medicine and Surgery

BDS  Bachelor of Dental Surgery

B Sc AH (Animal Husbandry) Bachelor of Veterinary Sciences

B Sc  Bachelor of Science

B Sc Microbiology  Bachelor of Science in Microbiology

B Sc Biotechnology  Bachelor of Science in Biotechnology

B Sc Bio Chemistry  Bachelor of Science in Bio Chemistry

B Sc  NursingB PT  Bachelor in Physio TherapyB Pharm  Bachelor in Pharmacy

B Sc Agriculture  Bachelor of Science in Agriculture

B Sc Horticulture  Bachelor of Science in Horticulture

B Sc Environmental Science  Bachelor of Science in Environmental Science

B F Sc  Bachelor in Fisheries Sciences

B Sc MLT  Bachelor in Medical Technology

B Sc Occupational Therapists

B Sc Audiology

B Sc Speech and Language Pathology

B Sc Radiography

B Sc Rehabilitation Therapy

B Sc Food Technology

B Sc Nutrition and Dietetics

B Sc Botany

B Sc Zoology

B Sc Anthropology

B Sc Home Science
And much more.
As this above branches are promising and no much saturation is there like in engineering and alied branches taking PCB will be a worthful decision according to me.All the best for your career.

Mayur, this is your call. A decision none other but you should decide based upon your field of interest with respect  to your future. Personally, I scored a cent percent in Maths std 10 and yet opted for Bio as my subject of choice. As my 10+2 course had to have an optional subject , I did choose Maths as well. But my personal option is to choose one of the two as your input in Maths would no where help you with your NEET Rank. Be really serious about one of them Drop the other.
Hope this helps you.

Hi Mayur, As per your choosing one out of maths and bio, so that you can choose engineering or medical stream... First think it depends on what you want to become... But if you think you are not clear about that... You can use CAREERS360 pathfinder... That will help you to decide...
If you have onoy engineering and medical which is not only options with maths or bio.... But since you said about these two... I would say to understand about the commitment of the courses, their future scope in terms of money, social status if these thinks matter... If you have no idea about these things too... Pay a visit to a doctor and a engineer in your locality.. You will get some idea.. Do you like what they are doing....
In medical you have to spent atleast 6 yrs for graduation... Then one year bond in rural setting in most govt colleges.... In engineering you have 4 yr graduation... After 3 yr you may get chance of campus selection.... In engineering depending on branch, it can be like you have to relocate if you are not from metros or pune hyderabad banglore... In mbbs, bams, bhms usually this is not required at initial phase.....
Hopefully it helps to some extent
Regards
Dr Parmanand Agarwal
MBBS MD
Career counselor

Which stream you want to go for totally depends on your interest and potential like if you wish to be an Engineer then Physics,Chemistry and Mathematics would be required and if you wish to be a doctor then you will have to choose Physics, Chemistry and Biology as the scope of both the fields is decent. So kindly consider your interest and potential before you make any decision and once it is decided then let me know I would love to guide you further for IIT-Jee or NEET whichever you choose.

Good Luck!!!

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