Verbal Reasoning - Mental Ability Questions

If "A" means "subtraction", "B" means "division", "C" means "addition" and "D" means "multiplication", then

305 B 5 A 28 C 43 D 12 = ?

In the following question, select the related letter/letters from the given alternatives.

LJK : IGH : : PST : ?

In the following question, select the related word pair from the given alternatives.

Sedimentary : Rocks : : ? : ?

Select the related word/letters/number from the given alternatives.

KOT : PJO : : FIR : ?

In the following question, select the related number from the given alternatives.

31 : 3 : : 23 : ?

In the following question, select the related word pair from the given alternatives.

School : Education : : ? : ?

In the following question, select the related letters from the given alternatives.

NP : HJ : : SY : ?

In the following question, select the related word pair from the given alternatives.

Flag : Nation : : ? : ?