Medicine & Health Sciences

Well, I think I can answer your question since I too faced the same scenario years before.I'll try to keep it short and simple.
Image of a Doctor: You can do a lot of social welfare work. You are kind of god wherever you live. You will be in the good book of many people. Respect will follow you everyday everywhere. There is no doubt about it.
Image of an engineer: You will not find respect, you will have to earn it by doing something worthy and extraordinary. You are just an individual. You may or may not get a chance to work directly for the welfare of the people. Chances are less. But let me tell you any social service is worthy of respect and honor. But the medical servants own a little more because they are people who save lives.
Personal life of a doctor: It is hectic, painful and stressful. Imagine yourself fighting death every day and saving lives and sometimes failing which takes a toll on you. It scrapes away your soul unless you are strong hearted. Hospital is not a fun place.You have to have a lot urge in you to become a doctor and must be willing to sacrifice your fun, pleasure many a time. As for the money, you will start earning at a later age and can keep earning until your old age. You have to be a lot more studious, diligent and hard working.
Personal life of an engineer: It is all fun & pleasure and doesn't have to be under a Damocles sword all the time. You know your negligence or failure won't be taking a life. Besides engineering life is very enjoyable. You can give time to your family.You will be capable of earning early of the age and can also earn at par with a doctor.
PS: I have written all these keeping in view you don't waste your life in either case and I have judged from a common platform.
Besides, you must understand yourself what you want and what you are willing to sacrifice whatever the cost.

Hi Abhishek Taneja,
An important point to know here, medical studies in Canada can be done only after completing a Bachelor's degree. First and foremost, you need to apply for a BS degree in a relevant field such as biological sciences which would be of four years, after completing your degree you have to clear the Medical College Admissions Test and apply to a medical school. Now, most medical schools do not admit international students so studying medical in Canada is a tough and difficult choice. Please check university websites in Canada and find out the requirements and check the international student requirement. Typically maths is not required but if they don't admit international students there is no point of preparing. Rather you should try applying to US, Australia, UK or even Singapore. Remember USA also has the same rules but allows foreign students to study medical.