All the answers provided are correct.
Radio waves from smartphones may be carcinogenic - Mobile phones and their towers generate radio waves. Several studies have suggested that though low frequency radio waves aren’t harmful to humans, but over exposure to them may lead to tumours in the body.
Smartphones cause anxiety, increased stress - Cancer aside, smartphones cause a variety of health issues. They have been found to increase anxiety and mental stress in teens. Mobile radiations may also cause learning disabilities and lowered IQ in infants, according to some reports.
<span>The answer is letter d. a person should seek medical treatment the first moment he or she suspects having an STI. The best time to be treated for STI is to be treated immediately. Do not neglect any symptoms of STI, because it may worsen and can cause serious illness. but the best treatment for obtaining STI is prevention. </span>