C MCQs :- multiple choice questions and answers. e.g C MCQS,C Mock Tests , C Practice Papers ,C Sample Test,C Sample questions

Question 1: Which one of the following classes are present System.Collections.Generic namespace? 1. Stack 2. Tree 3. SortedDictionary 4. SortedArray

1 and 2 only

2 and 4 only

1 and 3 only

All of the above