Ranikhet is a

Answer: Option A

Ranikhet is a Viral disease.
Ranikhet disease, also known as Newcastle disease is one of the most important viral diseases of poultry that affect a wide range of birds including chicken.
It is a contagious viral avian disease affecting many domestic and wild bird species; it is transmissible to humans. The disease is caused by Newcastle disease virus (NDV), an avulavirus.