Who among the following has proposed Systematic Behaviour Theory?

After completing each problem, the pupils are given ice cream. This is a use of______.  

According to Sheldon which of the following is not the type of personality? 

In a class, students work together in groups on a project, it is an example of -

“Mental health means the ability to make adequate adjustment to the environment on the plane of reality" statement is given by: 

Which of the following is the most important level, at which all plans are implemented and which is the foundation stone of all levels? 

Under which aspect the strategies to mention mental health come under?

Which of the following is considered as the "Golden Period" of life span?