A \( ^{228}_{92}\text{Ac} \)
B \( ^{221}_{87}\text{Fr} \)
C \( ^{232}_{90}\text{Th} \)
D \( ^{220}_{86}\text{Rn} \)
E \( ^{223}_{88}\text{Ra} \)
Correct Answer: Option E
Download our app for free and access thousands of MCQ questions with detailed solutions