Question
Who defined the various roles of a manager into three
categories of interpersonal informational and decisional roles?Solution
According to Henry Mintzberg , a manager has 10 roles sub-divided into three categories – interpersonal. Informational and decisional. The decisional roles include that of entrepreneur, negotiator, resource allocator and disturbance handler. 
What is colour of light related to?
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Which of the following materials exhibits piezoelectric effect?
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