TS EAMCET 6-Aug-2021 Shift 1 Question Paper

Which of the following is correct with respect to the following statements?
Due to diffusion of elections from n to p - side___
(I) electrons are accumulated in the depletion region
(II) election drift current is from p - side to n - side
(III) an ionised donor is left in the n - region
(IV) electrons of n - side comes top-side and electron-hole combination takes in p - side
Select the correct option from the following.