Q15Multiple correct4 Marks30 Apr 2023

Select all correct implementations of a function named unique that accepts a non-empty list L of integers as an argument. The function should remove all duplicate elements from the list L. Specifically, it should return a list L_uniq that retains the first occurrence (from the left) of each distinct element in the input list L.

A

``` def unique(L): L_uniq = [] for elem in L: if elem not in L_uniq: L_uniq.append(elem) return L_uniq ```

B

``` def unique(L): L_uniq = [] for elem in L: if elem in L_uniq: L_uniq.append(elem) return L_uniq ```

C

``` def unique(L): L_uniq = [L[0]] for i in range(1, len(L)): if not(L[i] in L[:i]): L_uniq.append(L[i]) return L_uniq ```

D

``` def unique(L): L_uniq = [] for i in range(1, len(L)): if not(L[i] in L[:i]): L_uniq.append(L[i]) return L_uniq ```