Dim strOne strOne=InStrRev("abc","ABC") Msgbox strOne
C
Correct answer
Explanation
InStrRev performs a case-sensitive search when comparing strings. Since 'ABC' (uppercase) does not exist in 'abc' (lowercase), the function returns 0 to indicate the substring was not found. Option A would be correct only if the search were case-insensitive or if the strings matched case.