UK

Hi Vismay,
Your grades are decent, however you must also take UKCAT ( UK Clinical Aptitude Test) for admissions into a medical school in UK. Additionally you must take IELTS too. The only benefit you will be getting because your sister moved to London is that she will know the process. Your admissions into a college has nothing to do with your sister living in London. You must fulfill the admission requirements most importantly. Please read about UKCAT here
http://www.ukcat.ac.uk/ and visit university websites for admission information.
Good luck.

UK have a different name of courses ACCA, ICAEW, CPA etc. You hv the option of completing CA in India and then applying for membership at UK. Check here.
http://www.icai.org/post.html?post_id=11449

Hi Tapan,
Admission requirements vary but in top colleges you must have excellent academic records. For universities in US you must also take GRE. Additionally you must take TOEFL or IELTS. For admissions you will require LOR, UG transcripts, statement of purpose, application fees. There are also university specific requirements as mentioned, so you must select the universities and check the websites. Few universities might also require work experience. Hope it helps.

You have to clear GRE exam.

Universities offer schorlarships as great schorlarships for certain courses which you have to in University website or search as Great schorlarships. You can also try IELTS schorlaship of 3 lakhs against tuition fees.

Both the countries have good options but post study visa and work visa are of better duration in canada. The cost may also vary in both. You require to hv the following:
1. GMAT score
2. TOEFL/ IELTS band of 6.5 above
3. Reference letters
4. Work experience in some universities.
5. SOP/ Personal essay

Dear Poonam, three years degree from India is accepted in UK and Ireland, so you can apply. However check for minimum percentage requirements as top schools such as LSE requires a minimum of 70%. Additionally you need to take IELTS or TOEFL.
Best Wishes

U may not get a nit but u may get other good colleges.

Hi Deepali,
Admission to LSE is extremely competitive. Entry requirements as per LSE website include a minimum of 70% in your bachelor degree or a CGPA of least 3.5 (out of 4) or above. Additionally you must take the IELTS or TOEFL. There is no GRE score requirement. The admission process is online. For better understanding please go through
http://www.lse.ac.uk/study/graduate/enquirer/entryRequirements/englishLanguage.aspx
http://www.lse.ac.uk/study/graduate/enquirer/howToApply/home.aspx
http://www.lse.ac.uk/economics/home.aspx
Hope it helped.