Question: # Consider the following Python code: def mystery _ function ( x ) : if x > 0 : return mystery _ function ( x

# Consider the following Python code:
def mystery_function(x):
if x >0:
return mystery_function(x -1)+ x
else:
return 0
result = mystery_function(4)
# What will be the value of 'result' after executing this code?
a)4
b)6
c)10
d)15

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