Canada

Yes! If your academics, statement of purpose and letter of recommendation are good then nothing can stop you getting admission in any good university.

You had mentioned that you have applied to Canada student visa. It is impossible for you to get admission with more than 10 back logs. No college or university will give you admission if you have more than 10 back logs. It is surprised that you have applied for visa. Without admission and paying the fees you can not apply for visa.

Canada and Australia both are the top two countries for the same. But I would suggest Australia because in coming time there is lot of demand of automobile Engineers there. All the best. Please like and follow.

Check here for listed professions-
https://www.immigration.ca/fast-track-high-demand-occupations.

Hi Mehak,
A minimum of 12 years education is required for further studies. He can search for high schools to complete his 11th and 12th otherwise he won't be qualified for further studies. An important thing here to note is schooling can be expensive for international students, for the locals its free. Ask him to complete his 12th from NIOS or check schools in Canada.

Hi,
You can another MS or check for PG Diploma in areas like environmental Science, biochemistry, energy Science, renewable energy, food and nutrition etc. Just figure out your career plans, what you want to do and decide accordingly.

Please refer the article in the link to get an understanding related to admission in Canada: https://studyabroad.shiksha.com/mba-in-canada-articlepage-1371.

Yes, depends on the programme and university admission requirements. It may be difficult to apply to US and Canada since you have a 3 year degree. Just check admission requirements, course requirements and proceed accordingly.