Hello,sir

 well for doing btech she has to appear in entrance exam, now sir as want to do btech from NIT colleges,so she has appeared in jee main.Jee main is a national entrance exam if she crack jee main she can take admission in NIT colleges in any part of india , and also then she could be eligible to sit in jee advance. if she crack jee advance she could be able to btech from IIT colleges! and wbjee and kit jee is a state level exam conducted by an university , if she could crack wb jee and kit jee she could be eligible in repesective colleges or institute affiliated by that university!

hope this will help you 

Hello Anindo

If your daughter is going to give ISC in 2019,she needs to fill the forms for WEBJEE,KIITJEE or any other as soon as possible as the dates may end soon.The first slot of JEE mains is also over.She can fill the form for the next slot that is in april and give mains that time.If she will be giving ISC next year,then she has alot of time.She can just prepare for now and then fill cooncerned forms next year.Hope this helps.

Good Luck!