Q. Consider the following statements regarding noble gases:

1. Helium has the lowest boiling point of any known element.
2. Neon is used in cryogenics because of its lowest liquefaction temperature.
3. Argon is commonly used in incandescent bulbs to prevent filament oxidation.

Which of the above statements is/are correct? Select the correct answer using the codes given below:
Answer: 1 and 3 only
Notes: Helium has the lowest boiling point of any element (−268.9 °C); thus, statement 1 is correct. Neon is not commonly used in cryogenics; instead, liquid helium is standard for low temperatures, making statement 2 incorrect. Argon is widely used in incandescent bulbs to prevent oxidation due to its inertness, confirming statement 3 as correct.