Does sombody knows how to solve this or atleast give me an idea how to do. As I am completely new to C.

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!

If you meet a specific problem, then please ask about that and we will do our best to help. But we aren't going to do it all for you!

Quote:

As i said that i am new to this.so i just applied strtok but it just split the function but the remaining logic is still not clear to me

What you have done is mystery to us, because you didn't show anything.

You show no attempt to solve the problem yourself, you have no question, your main effort is pasting the requirement, you just want us to do your HomeWork.
HomeWork problems are simplified versions of the kind of problems you will have to solve in real life, their purpose is learning and practicing.

We do not do your HomeWork.
HomeWork is not set to test your skills at begging other people to do your work, it is set to make you think and to help your teacher to check your understanding of the courses you have taken and also the problems you have at applying them.
Any failure of you will help your teacher spot your weaknesses and set remedial actions.
Any failure of you will help you to learn what works and what don't, it is called 'trial and error' learning.
So, give it a try, reread your lessons and start working. If you are stuck on a specific problem, show your code and explain this exact problem, we might help.

As programmer, your job is to create algorithms that solve specific problems and you can't rely on someone else to eternally do it for you, so there is a time where you will have to learn how to. And the sooner, the better.
When you just ask for the solution, it is like trying to learn to drive a car by having someone else training.
Creating an algorithm is basically finding the maths and make necessary adaptation to fit your actual problem.

You need to visit some Learn C tutorial to learn the basics of the lanuage.

Your task is to read and interpret a data buffer and work with. C has the native data type char in which so have a every byt. With iteratig about it you can read eache byte.

char *data =// your data
if( (data[0] == '\r') && (data[1] == '\n')) {
// seperator found
} 

tip: write clear code with function and explaining names