I made Mphil Grade (pass) in my Masters, is PhD still possible for me

You'd need to talk to any supervisors you're interested in working with about that. If you have mitigating circumstances, they will likely be understanding. If you don't have any mitigating circumstances, they'll be concerned that you won't be able to cope with the demands of PhD study. You also won't be a competitive applicant when it comes to funding either.

You may be able to persuade a supervisor if you have relevant research experience and are willing to self-fund.

What was your undergraduate degree grade?