Answer:
Option C)
for
is not the correct way to define the given infinite sequence

Step-by-step explanation:
Given infinite sequence is 
Option B)
for
is not the correct way to define the given infinite sequence 
Now verify
for
is true for the given infinite sequence
That is put n=1,2,3,.. in the above function

When n=1, 


When n=2, 


When n=3, 


and so on.
Therfore
for
is not the correct way to define the given infinite sequence

Therefore option C) is correct