Science

Hi,
According to what I have understood is that your either results have not been declared or exams not held. No issues, you can apply for provisional admission. That is to say you can show your clear result before the start of the new session of M.Sc.
Every university has its refund policy where for example, you have applied for an NIT, IIT and instead of just waiting, you book a seat in another college by paying a minimum amount. But later if you do not want to take admission there you can cancel your admission and apply for a refund wherein just a little amount of your money.Check for the refund policy and apply for admission in good colleges like SRM, Lady Sri Ram, LPU, etc. LPU would aid you to go for advanced level of research works too.

Hi
To get admission into BA, you need to pass in 10+2 and in most of the colleges in India, there is no such provision for direct entry into second year of BA for diploma holders of Electronics. You need class 12 marksheet with passing grades to get admission in a BA program.
You can apply for B.A after completing your diploma as diploma is equivalent to 12th. You can also choose professional course rather than B.A or the best option is to do graduation in the stream which you have already study in your Diploma.
Hence, first selection should be of a good college which is of repute so that it can give the best academic excellence in the form of best faculty who are there to help you. Added to this, well equipped labs and library. Exposure of the students to the world market and a wide platform for the student to deal with the world level activities is a must.
Browse some good colleges like LPU which gives best academic support along with the best scholarships also the Covid scholarships to aid education at such grim times.
You can check Lady Sri Ram College which is also good for BA.

M.Sc. Aquaculture or Master of Science in Aquaculture is a postgraduate Aqua Science course. Aquaculture, also known as aqua-farming, is the farming of aquatic organisms such as fish, crustaceans, mollusks, and aquatic plants. It includes the study of Aquatic Toxicology, Biodiversity, Fish Nutrition, Fish diseases, Immunology, and endocrinology. The faculty does investigations on varied aspects of fish, frog, broilers, and mice as experimental models. The duration of the course is two years and it is career orienting in nature which opens many career opportunities after passing it. The course is job orienting in nature that opens many opportunities after passing it. M.Sc. Aquaculture Eligibility
Students should have passed B.Sc. , with Zoology/Fisheries/Fishery Science/Aquaculture/Industrial Fish and Fisheries as one of the subjects in three subjects of equal importance/B.Sc. , Degree in Fisheries or B.F.Sc. There are provisions of entrance tests in a few of the universities as the entrance criterion.

In 12th grade, if you have not opted for mathematics, then also there is no issue because the good university like LPU start with the basics of the subjects considering the diversity of the student. Moreover, 12th grade mathematics is different and little tougher than business mathematics because business mathematics is bit an application instead of derivation in mathematics. In addition to this Logical Reasoning and Statistics is not related with the Mathematics for grade 12. I recall, one of my friend also faced the same situation but when she joined LPU, all the concepts were started from the scratch and she didn't face any issue. Rest if you can manage to keep Mathematics in grade 12, you can opt for it.