Identify the correct statement regarding the human respiratory system: MCQ with Answer and Explanation

Explanation:
Dengue fever is caused by the dengue virus (flavivirus) transmitted by Aedes aegypti mosquito. Cholera is bacterial (Vibrio cholerae), diphtheria bacterial (Corynebacterium diphtheriae), leprosy bacterial (Mycobacterium leprae). Viral diseases include influenza, common cold, AIDS, COVID-19, hepatitis, polio, and rabies. Dengue symptoms include high fever, severe headache, joint pain, and rash.

Explanation:
Dairy farming is the agricultural practice of breeding and raising livestock (like cows, buffaloes, goats) specifically for the long-term production of milk and milk products. Poultry farming involves the commercial rearing of domesticated birds (like chickens, ducks, turkeys) for the production of meat (broilers) and eggs (layers). Apiculture is the scientific rearing and management of honeybees (Apis species) for the production of honey, beeswax, and other hive products; silk production is sericulture. Thus, statements 1 and 2 are correct.

Explanation:
The pleural cavity between the visceral and parietal pleura contains a thin layer of pleural fluid, lubricating the surfaces to reduce friction during lung expansion and contraction. Synovial fluid is in joints, cerebrospinal fluid surrounds the CNS, lymph is in the lymphatic system. Pleural effusion is excess accumulation.