Which 2 questions are wrong ?
Can you tell me which 2 questions are wrong so that i can understand them?
do you mean that some questions have some error ??
No , my two answers are wrong so i want to know which ones are wrong
Now it is showing 
good !! mark your doubt as resolved if no further issues
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As we know that time complexity of binary search is O(logn). So answer should be option d but in answer it is showing option b which is linear time
it is Question no 2 :
because its linked list not array .
refer this :- https://www.geeksforgeeks.org/binary-search-on-singly-linked-list/