Among the given options, option 3, Scurvy, is not a sexually transmitted disease (STD).

1) Syphilis: Syphilis is a bacterial infection that is usually spread through sexual contact. It can cause sores, rashes, and other symptoms if left untreated.

2) Gonorrhea: Gonorrhea is also a bacterial infection that is primarily transmitted through sexual contact. It can affect the genitals, rectum, and throat, causing symptoms such as pain, discharge, and inflammation.

3) Scurvy: Scurvy, in contrast to the other options, is not a sexually transmitted disease. It is a condition caused by a deficiency of vitamin C, usually resulting from a poor diet. Scurvy mainly affects the connective tissues in the body and can cause symptoms like weakness, fatigue, and bleeding gums.

4) Hepatitis B: Hepatitis B is a viral infection that can be transmitted through various means, including sexual contact. It primarily affects the liver and can lead to chronic liver disease if not properly managed.

In conclusion, while syphilis, gonorrhea, and hepatitis B are sexually transmitted diseases, scurvy is not. Scurvy is caused by a deficiency of vitamin C and is not transmitted