The correct option is 3: Ranikhet Ranikhet disease, known internationally as Newcastle disease (ND), is universally recognized by veterinary pathologists and poultry farmers as one of the most critical, highly contagious, and fatal viral infections affecting bird populations worldwide. It is caused by virulent strains of Avian avulavirus 1 (APMV-1) and is notorious for its ability to cause massive economic losses in the poultry industry. The disease's status as the…Read More