Direction: In the FOLLOWING questions, out of the four ALTERNATIVES, choose the one which can be SUBSTITUTED for the given words/ sentence.
null (V.) : to reduce to nothing
lull (V.) : to MAKE somebody relaxed and calm; soothe
annul (V.) : to state officially that something is no longer legally valid
cull (V.) : to kill a particular number of animals of a GROUP in order to prevent the group from getting too large