The correct option is B A- 3, B- 4, C- 1, D- 2
The term pneumonia refers to pulmonary infections, caused by viruses and bacteria. The most commonly known bacteria is Diplococcus pneumoniae. It is a Gram-positive bacteria usually occurring in pairs. It generates an inflammatory condition in the lungs and affects the respiratory tract, sinuses and nasal cavity. The methods of transmission include sneezing, coughing and direct contact with an infected person.
Citrus canker is a disease which affects citrus species such as lime, oranges and grapefruit. It caused by Xanthomonas citri which is a bacterial pathogen. Citrus canker results in heavy economic losses to the citrus industry. Lesions appear on leaves, twigs and fruit which cause defoliation, premature fruit abscission and blemished fruit and can eventually kill the tree. It can be a serious disease where rainfall and warm temperatures are frequent.
Cholera is an infection of the intestine that causes severe watery diarrhea which can lead to dehydration and even death if untreated. It is caused by eating food or drinking water contaminated with a bacterium called as Vibrio cholerae. It is a comma-shaped, Gram-negative bacteria.
Leprosy is a chronic disease caused by a Gram-positive bacterium, Mycobacterium leprae. Leprosy primarily affects the skin and the nerves outside the brain and spinal cord called as the peripheral nerves. which results in a lack of ability to feel pain, weakness and poor eyesight.