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PhD -Doctor of philosophy
It is highest degree in university.A person  who holds phd degree can use academic  title  of "Doctor".To be eligible for getting admission in PhD course ,a student has to complete  bachelor degree and master's degree in respective field.The entire  course of PhD takes between 4 to 8 years based on independent research and  advance courses. The PhD degree varies  considerably  according to a country, institution  and time period.
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