Hello Karthik,

Do not worry, you will get some marks as step marking procedure is generally followed while correction of answer scripts as that is the procedure followed in correction of board exams.

As for your this particular question,if the question is of 5 marks, then you should get 4 marks as the voltage of inductor and capacitor are not very important parts of the derivation but the 1 mark will be cut as you have missed out on a part of the derivation.