[munis najmi]

I Want to ask you that we all know that all the muslims of the world will be divided into 73 firquas but no one knows which firqua will go to janna then how we will choose the best firqua and how you have come to choose the ahle-hadidth?can you please tell me what it is actually about and how we can come across this from the light of quran. My english is not very good I am in class nine so if I had committed any mistakes in writing this question please forgive me . munis najmi khan