Just incase if anyone like me interested to know more ....
I have recently finished the landing formalities, everything went smooth except for the wait time about 2hrs for immigration. Haven't got landing card in flight as everything was computerized. I should say those machines at the airport are pretty smart.. the moment you scan your passport it will tell you which flight you travelled on. Nothing was asked about BSF186 form.
There came the words 'Congratulations, now you are the PR of Canada.Welcome to Canada. Stay for 2/5 years to continue the status and 3/5 years to apply for Citizenship.
There is a counter next to Immigration to apply for SIN and took about 30 mins to get it. They gave a booklet on Canada and very much impressed by it. It has everything one needs to know on their first visit. Of course that what the book should meant to be.
Took about 3hrs for the entire process and to get out of airport. I must say people are very friendly except for few who looked a bit grumpy.