Answer:

The group that contains all bacterial diseases among the options given is option 'A', which includes the diseases typhoid, tuberculosis, and anthrax.

Explanation:

Typhoid:
Typhoid is caused by the bacterium Salmonella typhi. It is a highly contagious disease that spreads through contaminated food and water. Symptoms include high fever, headache, stomach pain, and diarrhea. If left untreated, it can be life-threatening.

Tuberculosis:
Tuberculosis, commonly known as TB, is caused by the bacterium Mycobacterium tuberculosis. It primarily affects the lungs but can also spread to other parts of the body. Symptoms include persistent cough, weight loss, fatigue, and fever. It is transmitted through the air when an infected individual coughs or sneezes.

Anthrax:
Anthrax is caused by the bacterium Bacillus anthracis. It can infect humans through contact with infected animals or their products. The bacteria can enter the body through cuts or abrasions on the skin, inhalation of spores, or ingestion of contaminated food. Symptoms depend on the route of infection but can include skin lesions, fever, and respiratory distress.

Malaria, Kala-azar, Influenza, and Dengue:
These diseases are not caused by bacteria but by other organisms.

Malaria:
Malaria is caused by protozoan parasites of the genus Plasmodium. It is transmitted through the bite of infected female Anopheles mosquitoes. Symptoms include fever, chills, headache, and muscle aches.

Kala-azar:
Kala-azar, also known as visceral leishmaniasis, is caused by the protozoan parasite Leishmania donovani. It is transmitted through the bite of infected female sandflies. Symptoms include fever, weight loss, enlarged spleen and liver, and anemia.

Influenza:
Influenza, commonly known as the flu, is caused by influenza viruses. It is highly contagious and spreads through respiratory droplets. Symptoms include fever, cough, sore throat, body aches, and fatigue.

Dengue:
Dengue is caused by the dengue virus, which is transmitted through the bite of infected Aedes mosquitoes. Symptoms include high fever, severe headache, joint and muscle pain, rash, and bleeding.

Therefore, the correct group containing all bacterial diseases is option 'A' (Typhoid, tuberculosis, anthrax).