I am from Pakistan. I had applied for a UK visa for my plab (medical) examination, but my visa was refused due to sudden influx of money in my father's bank statement and secondly as I am unemployed, so my ECO thinks that I would not return back home. Now I am thinking of re-applying with my mother's bank statement and showing some property in my name. Should I re-apply or appeal?
You were refused a UK PLAB visa (Paragragh 75 of the Immigration Rules) because of an apparent 'funds parking' gambit (see UK PLAB Visa Refusal due to unexplained bank deposits for definitions), and you want to know if you should make a fresh application or appeal.
The answer here is quite straight-forward because a PLAB refusal does not attract appeal rights. This would have been explained in your refusal notice. Attempting to appeal when there is no right would demonstrate to them that you do not understand the rules and may damaged future applications.
The remaining option is to make a fresh application. You can use the advice previously given in UK PLAB Visa Refusal due to unexplained bank deposits as a guideline.