Here each question contains statement given in two columns which have to be matched. Statements in column I are labelled as A, B, C and d. Whereas statements in column II are labelled as p, q, r and s. The answer to these question have to be appropriately bubbled as illustrated in the following example.
If the correct matches are A-p, A-s, B-q, B-r, C-p, C-q and D-p, then the correctly bubbled 4 `xx` 4 matrix should look like the following.

`{:(,"Column I",,"Column II",),(A,"Sodium",p,"Metal",),(B,"Potassium",q,"s-block",),(C,"calcium",r,"Ionic hydride",),(D,"strontium",s,"Inert solvent",):}`

Answer

`(##DIN_OBJ_CHM_V03_C12_1_E01_363_A01##)`