Hey,
The education system of Canada is different from what we have in India. The subject combinations of your senior higher school does not really matter if you have a brilliant academic record and something significant that adds to your credibility.
There are no centralized Canada wide entrance tests, each institute sets its own admission standards and assesses the qualifications of each applicant individually.
You are also required  take English Proficiency tests like TOEFL (Test of English as a Foreign Language) or IELTS (International English Language Testing). Every university has its own minimum requirements and scores with respect to standardized tests.
Apart from this, your letter of recommendation and statement of purpose are also very important.
Hope this helps.
Good luck.