Chemistry · Classification of Elements and Periodicity in Properties

According to the chemical reactions with water given in the text, what are the products formed when \( \text{Na}_2\text{O} \) and \( \text{Cl}_2\text{O}_7 \) react with water respectively?

1. A
   \( 2\text{NaCl} \) and \( \text{Cl}_2 \text{O} \)
2. B
   \( 2\text{NaOH} \) and \( 2\text{HClO}_4 \)
3. C
   \( \text{Na}_2\text{CO}_3 \) and \( \text{HCl} \)
4. D
   \( \text{NaOH} \) and \( \text{HCl} \)