CBSE 12th

Yes, with 58% in your 12th class non-medical stream CBSE board, you are eligible for admission into the BBA programme at DAV College, Chandigarh as the minimum required percentage is 50%

But yeah, a student of a 12th pass standard can get direct admission for a B.Tech programme without appearing to JEE exams as numerous universities or private colleges grant admissions as per the score gained on 12th or else through their individual entrance exam tests. For example, certain famous universities like BITS Pilani, VIT University and also SRM Institute of Science and Technology conduct exams themselves called BITSAT, VITEEE, SRMJEEE individually. The admission is varied, but mostly one requires a minimum percentage of 50-60% in 12th in the Physics, Chemistry, and Mathematics depending on the institution and course.

12th marks are not taken into direct consideration for admissions into AFMC PG. The primary and foremost criterion of admission is in the NEET PG test followed by an interview and counseling process. However, your 12th marks get involved while deciding your eligibility to sit for the exam NEET PG as that would be the completion certificate of the undergraduate medical course (MBBS) under a recognised institute. While 12th marks do not directly affect the selection in AFMC PG, maintaining good academic performance throughout your MBBS is essential to secure a seat in AFMC and other reputed medical colleges.

Candidates seeking admission to forensic Science courses after 12th must fulfil two criteria: Must have completed the 12th examination or an equivalent in the Science stream. Have achieved a minimum of 50% aggregate marks.

To pursue Forensic Science, candidates must take relevant entrance examinations that are conducted by several universities offering Forensic Science courses.

Yes, the National Forensic Science University (NFSU) is regarded a good option for pursuing forensic Science studies beyond 12th grade, and admittance is mostly dependent on an entrance exam administered by the university itself, known as the "National Forensic Admission Test (NFAT)". 
Key details concerning NFSU admission:
Entrance Examination: To be admitted to NFSU after 12th grade, you must take the NFAT exam.
Eligibility: You must have completed your 12th grade with Science subjects to be eligible for the NFAT.
Merit List: The final selection is based on your NFAT performance and the merit list that was prepared.

The following eligibility criteria must be satisfied for DAIICT's admission through ACPC in Gujarat :-

Minimum Aggregate Percentage in 12th Board:

For the General category: Minimum German aggregate marks of 45 in Physics, Chemistry, and Mathematics (PCM).
For the Others under reserved category (SC/ST/SEBC): Minimum aggregate 40 in PCM.
Entrance Exam Requirement: Must qualify GUJCET entrance, because admissions are granted on the basis of merit GUJCET rank only through ACPC.

Also, check for other particular requirements mentioned in the ACPC/DAIICT admission specifics for that year.

For all degree programmes in Law, admissions will be based on the CLAT 2022 Scores and +2 aggregate taken in the ratio of 25% : 75% respectively. For all other degree programmes in Sciences, Arts, Commerce, Education, etc., admissions will be based on the qualifying exam marks.

Candidates who have completed graduation from recognised colleges can also apply at colleges which admit candidates on the basis of merit. Therefore, candidates have ample opportunities to pursue LLB even without appearing CLAT.