no you are right 25% chance because there are 4 answers.

I did a multiple choice exam once which was negatively marked. Meaning that there were 6 possible answers and if you got it wrong you got 1 mark taken away and if you got it right you got one mark added.
I guessed everysingle answer cause I hadnt studyied (and I am talking about inny minny miny mo guessed) and I go 49 percent, meaning that actualy I got something like 75% of the answers right! What are the chances of that??