Homonyms refer to the word which is pronounced and spelled similar with the other word(s) but is different in meaning.
As in the above options, a choice which is a pair of homonyms is b. Blue, blew
Here, Blue refers to the color whereas, blew is the past of blow, which refers to an act of motion of the wind or air.
The young girl was remarkably self-confident when she was giving her speech
The victim was lured to a deserted spot.