which is a correct way to open a file in python

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Programming and Problem Solving through Python : File Processing in Python

which is a correct way to open a file in python

A. file_object=open(file_name,mode)

B. open(file_object,file_name,mode)

C. file_open(file_object,file_name,mode)

D. file_object=file_open(file_name,mode)

Solution

A. file_object=open(file_name,mode)