Pregnancy tests in Mumbai

Hi, I need to know what is the procedure for getting a pregnancy test done in any pathology lab in Mumbai? My best friend thinks she might be pregnant and she needs to get one done without her parents knowing, so I basically want to know whether we need any doctor's prescriptions or provide personal information to get a pregnancy test done.

Also, are the home pregnancy tests reliable? Which one is the best and most reliable? And how much does the lab pregnancy test and a home pregnancy test kit would cost?

I really appreciate any help.

Thanks.