Answer : 4. "22 May"
Explanation :

World Preeclampsia Day, on May 22, raises awareness about pregnancy complications that can pose a threat to life. Preeclampsia that occurs after the 20th week of pregnancy or after delivery involves dangerously high blood pressure and organ problems. It arises from placental health problems. Symptoms include high blood pressure, protein in the urine, and swelling. It poses risks to both the mother and the fetus, possibly leading to premature birth or death.