My sincere thanks to each and everyone. I am really touched by the messages you all have posted. I feel emotionally awkward expressing myself so please allow me to turn this thread in to something useful.
Being mentally strong, dad accepted the fact that he will not survive the cancer illness so put up a brave face, arranged all things necessary for future of the family, guided me as all caring dads do and passed away peacefully. Being a non believer of perceived Gods, gurus & expensive hindu rituals, as per his wishes I will be regularly donating for education of underprivileged kids and personally to treatment of little children having cancer.
So I will appreciate it very much if anyone points me any good NGOs in and around Mumbai which are helping children fight cancer.
Regards