S-1:- Long form of periodic table completely helps in predicting the oxidation state of elements.
S-2:- Metallic and covalent radii of potassium are 203pm and 230pm respectivley.
S-3:- The following set of elements does not represent the correct order of electron affinity values `C lt Si gt P gt N`.
S-4:- Formation of `Se^(2-)` and `Ar^(-)`, both require the absorption of energy.
A. FFFT
B. TTFT
C. TTTF
D. TTTT
