At a school, a student could not drink his cup of milk for fear that someone might have added poisoned pills into it. He used to pour his milk back and forth repeatedly, just to make sure that there...

Extracted text: At a school, a student could not drink his cup of milk for fear that someone might have added poisoned pills into it. He used to pour his milk back and forth repeatedly, just to make sure that there are no pills. What type of disorder he is associated with? a) Phobia b) Obsessive-compulsive c) Dissociative reactions d) Conversion hysteria