About purchasing the course

If I buy the course right now then there are three options 1 month, 3 month and 6 month so will i have access to that course for that particular time or what? And the third course is not available right now what if it is not available at the end of 1 month then should I need to pay more to complete it?
Can you elaborate more on this both topics?
Thank you.

Yes @khushal_vanani,
You will have access depending on the enrolment option that you choose. The 3rd course of this specialization will be out by 13th July as per the latest notification that we have. So, in case your subscription expires by then, I guess you might have to pay again in order to renew your subscription. Feel free to validate it from Coursera’s Community Help. They will be able to give you a more definite answer. I hope this helps.