Explanation:

1. Incorrect. Passive euthanasia involves the withdrawal of life support or necessary treatment, while active euthanasia involves a doctor ending a patient's life with lethal substances.
2. Incorrect. In Germany, euthanasia is illegal, while physician-assisted suicide is legal.
3. Correct. Passive euthanasia has been legalized in India, especially for patients in a permanent vegetative state. Active euthanasia remains illegal.
4. Correct. A living will in India is a legal document that allows patients to specify actions concerning their health, especially when they can't make decisions due to incapacity.