This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cognitive development and defence mechanism, Subject name: Psychiatry
Ability to form a concept and generalize is known as 
Select and explain. 
A. Concrete thinking, B. Abstract thinking, C. Intelligent thinking, D. Delusional thinking
B: Abstract thinking
Answer: B: Abstract thinking 
Explanation: Thinking characterised by the ability to grasp the essentials of a whole, to break a whole into its pas, and to discern common propeies. To think symbolically. Ref: Synopsis of Psychiatry, 11e, pg 1407.