Step 1: Understanding the behaviour described.
The student fails to accept responsibility for inadequate preparation and instead blames external factors such as the examiner, other students, or the teacher.
Step 2: Explaining projection.
Projection is a defense mechanism in which an individual attributes their own faults, failures, or unacceptable feelings to others.
Step 3: Eliminating other options.
Reaction formation involves expressing opposite feelings, repression involves unconscious forgetting, and rationalization involves giving socially acceptable reasons rather than directly blaming others.
Step 4: Conclusion.
The student is projecting personal failure onto external agents.
Final Answer: (A)