Which of the following is an incorrect syntax for pointer

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Which of the following is an incorrect syntax for pointer to structure?
```
(Assuming struct test{int n;}*ptr_struct;)
```

1. (*ptr_struct).n = 110;
2. ptr_struct->n = 110;
3. *ptr_struct.n = 110;
4. Both (*ptr_struct).n = 110; and *ptr_struct.n = 110;
5. None of these

Correct Option: C

*ptr_struct.n = 110; is an incorrect syntax for pointer to structure.