Geo-Scientist Prelims 2026 Chemistry Q8: Which of the following order(s) of ionic radii is/are correct ?

Which of the following order(s) of ionic radii is/are correct ?

1. O²⁻ < S²⁻ < Se²⁻ < Te²⁻
2. Ti²⁺ < Ti³⁺ < Ti⁴⁺
3. O²⁻ < F⁻ < Na⁺ < Mg²⁺

Select the answer using the code given below :

1. (a) 1 only
2. (b) 1 and 2 only
3. (c) 2 and 3 only
4. (d) 1, 2 and 3