Explanation

• Roentgen rays are also called X-rays.
• They are used to detect fractures and bone diseases.
• They pass through soft tissues but not bones clearly.
• Doctors use them in medical imaging (radiology).
• They were discovered by Wilhelm Roentgen.

Last verified on 26-04-2026

Explanation

• Allergy is an abnormal immune response to harmless substances like dust or pollen.
• It occurs when the body reacts excessively to an allergen.
• This reaction involves the immune system producing antibodies.
• Thus, allergy is mainly due to an antigen–antibody reaction.

Last verified on 23-04-2026

Explanation

Explanation

• Claustrophobia is the fear of enclosed or confined spaces.
• It is classified as an anxiety disorder.
• People with claustrophobia may panic in elevators, small rooms, or windowless spaces.
• Symptoms include shortness of breath, sweating, rapid heartbeat, and anxiety.

Last verified on 02-04-2026

Explanation

• Asthma is a chronic respiratory disease affecting the airways of the lungs.
• It causes narrowing and inflammation of the air passages, leading to difficulty in breathing.
• Common symptoms include wheezing, coughing, chest tightness, and shortness of breath.

Last verified on 02-04-2026

Explanation

• Jaundice is a condition characterized by yellowing of the skin and eyes.
• It is caused by excess bilirubin due to liver dysfunction or disease.

Last verified on 01-04-2026

Explanation

• Diseases can be caused by bacteria, viruses, or other pathogens.
• Flu (Influenza) and Jaundice (Hepatitis A, B, or C) are caused by viruses.
• Typhoid and Cholera are caused by bacteria.
• Therefore, Typhoid and Cholera are not viral diseases.

Last verified on 31-03-2026

Explanation

• Hepatitis A spreads mainly through contaminated water or food.
• Common in areas with poor sanitation.
• It is a fecal-oral transmission disease.

Last verified on 31-03-2026

Explanation

• Hepatitis A is primarily spread through the fecal-oral route, often via consumption of contaminated food or water.
• It can be prevented by maintaining good hygiene, ensuring safe drinking water, and vaccination.

Last verified on 31-03-2026

Explanation

• Cholera is an infectious disease caused by the bacterium Vibrio cholerae.
• Symptoms include severe diarrhea, dehydration, and vomiting.
• Cholera can be prevented by clean drinking water and proper sanitation.

• It mainly spreads through contaminated water and food.
  It is most common in areas with poor hygiene and overcrowding.

Last verified on 3-03-2026