{:("Column-I", "Column-II"),((A)"Boron ",(P)"Vacant orbital in valency shell "),((B)"Phosphorus ",(Q)"Unpaired electron in valency shell "),((C)"Iron ",(R)"Non-metallic properties "),((D)"Calcium",(S)"No unpaired electron "),("",(T)X_(2)O_(3)"type (empirical ratio) oxide formation"):}

{:("Column-I", "Column-II"),((A)"Boron ",(P)"Vacant orbital in valency

1.	{:("Column-I", "Column-II"),((A)"Boron ",(P)"Vacant orbital in valency shell "),((B)"Phosphorus ",(Q)"Unpaired electron in valency shell "),((C)"Iron ",(R)"Non-metallic properties "),((D)"Calcium",(S)"No unpaired electron "),("",(T)X_(2)O_(3)"type (empirical ratio) oxide formation"):}
Answer» ANSWER :A-PQRT; B-PQRT; C-PQT; D-PS