The sum of all the integers k such that –23 < k < 24 is	Choose the most appropriate option.
A) 0 B) - 43 C) - 25 D) - 49 E) - 51

Rationale: "- 22 - - - - - - - - - - - - - - - - - - 0 - - - - - - - - - - - - - - - - - 23 values upto + 23 cancels outwe are left with only - 22 - 21 sum of which is - 43 . hence option d . b"
Answer: B