Question

The answer choices are A. I and ii, I and iii, ii and iv, iii and iv

Answer 1

The correct option is B

Only I and III are TRUE

Step-by-step explanation:

I. is valid

`a^4-b^4=(a^2+b^2)(a+b)(a-b)`

II. is invalid

III. is valid

`a^6-1=(a^2-1)(a^4+a^2+1)`

IV. is invalid