This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Thoughts in mind with rhyming rather than with meaning of thoughts - 
Select and explain. 
A. Flight of ideas, B. Perseveration, C. Circumstantiality, D. Clang association
D: Clang association
Answer: D: Clang association 
Explanation: In clange association, speech is directed by the sound of a word, rather than its meaning. Words have no logical connection; rhymic may dominate the verbal behavior.