Correct Option
All the listed diseases – Foot and mouth disease, Anthrax, Black Quarter, and Cowpox – are infectious diseases that affect milching animals.
- Foot and mouth disease (FMD) is a highly contagious viral disease that primarily affects cloven-hoofed animals, including cattle. It is characterized by fever and blister-like lesions on the tongue, lips, mouth, teats, and feet.
- Anthrax is a serious infectious disease caused by the bacterium Bacillus anthracis. It can affect various animals, including cattle, and is known for its rapid onset and high mortality rate.
- Black Quarter (Blackleg) is an acute, infectious, and often fatal disease of cattle and sheep, caused by the bacterium Clostridium chauvoei. It typically manifests as muscle swelling and lameness.
- Cowpox is a viral disease caused by the cowpox virus. It primarily affects cattle, causing lesions on the udder and teats, and can be transmitted to other animals and humans.
Since all four diseases mentioned are infectious and commonly affect milching animals, option (4) is the correct choice.
Incorrect Options
Options (1), (2), and (3) are incorrect because they exclude one or more of the diseases listed. Each of the diseases – Foot and mouth disease, Anthrax, Black Quarter, and Cowpox – is indeed an infectious disease relevant to milching animals.