Correct Answer: Option 1 – Gonorrhoea
The question asks which of the following common sexually transmitted diseases (STDs) is completely curable when detected early and treated properly. Let's analyze each option:
Option 1 – Gonorrhoea: This is the correct answer. Gonorrhoea is a bacterial infection caused by *Neisseria gonorrhoeae*. It is commonly transmitted through sexual contact. When detected early, gonorrhoea is completely curable with antibiotics such as penicillin, azithromycin, or ceftriaxone. However, if left untreated, it can cause complications such as pelvic inflammatory disease (PID), infertility, and increased susceptibility to HIV.
Option 2 – Hepatitis B: Hepatitis B is a viral infection caused by the Hepatitis B virus (HBV), which affects the liver. While it is possible to manage symptoms with antiviral medications, there is no complete cure for Hepatitis B. Chronic infection can lead to liver failure, cirrhosis, and liver cancer. A vaccine is available to prevent the disease, but once infected, lifelong management is required.
Option 3 – HIV Infection: HIV (Human Immunodeficiency Virus) is a viral infection that attacks the immune system. There is currently no cure for HIV, but it can be effectively managed with lifelong antiretroviral therapy (ART). ART helps to control the virus and prevent the progression to AIDS (Acquired Immunodeficiency Syndrome). Early detection and consistent treatment can help people with HIV live long, healthy lives, but it is not a curable condition.
Option 4 – Genital Herpes: Genital herpes is caused by the herpes simplex virus (HSV). Although antiviral medications can manage symptoms, reduce outbreaks, and lower the risk of transmission, there is no cure for genital herpes. The virus remains in the body and can reactivate, leading to recurrent outbreaks, although the frequency and severity can be reduced with medication.
Conclusion: Gonorrhoea is the only disease in the options listed that is completely curable with early detection and appropriate treatment. While other diseases such as Hepatitis B, HIV, and Genital Herpes can be managed, they are not curable.
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :