Concept:Drug abuse damages the brain and its normal functions, leading to serious mental and physical effects.
Explanation:Drugs alter the chemical balance in the brain.
This change disrupts thinking, reasoning, and memory.
Repeated drug use can therefore cause memory loss.
Medication and rehabilitation are treatments, not repercussions.
Brain drain is unrelated to drug abuse.
So, the most common repercussion among the options is memory loss.
Answer:D. memory loss