Can I give Zakat ti my maternal grandmother who is severely old and ill and has no money, property or source of income?
الجواب حامدا و مصلیا
It is now permissible for the questioner to give Zakat to his maternal grandmother. The questioners Zakat will not be valid. But is she is needy, then the questioner should assist her through any other means other than Zakat (like charity, providing her with things she needs etc.).
And Allah knows best.