Question 142:
Natural radioactivity consists of the emission of
- A \( \alpha \) -particle and \( \beta \) rays
- B \( \alpha \) -particle and X-rays
- C \( \gamma \)-rays and X-rays
- D \( \alpha \)-particle, \( \beta \) rays and \( \gamma \)-rays
- E \( \alpha \) -particle, \( \beta \) rays, \( \gamma \)-rays and X-rays