The correct answer is option 3: 3rd molar teeth. Wisdom teeth, also known as third molars, are the last teeth to erupt in the mouth. They usually appear between the ages of 17 and 25, which is why they are often called "wisdom teeth" since they appear later in life when a person is presumed to be wiser. Wisdom teeth often cause problems because there is not enough space in the mouth for them to grow properly. They may become impacted, meaning they are trapped in the jawbone or gum tissue and cannot emerge. When wisdom teeth become impacted or grow at an angle, they can cause pain, infection, and damage to adjacent teeth. In some cases, the removal of wisdom teeth may be necessary to prevent future oral health problems.