The snake was killed by the boy with a stick.
A stick was killed by the boys with a snake.
A snake with stick was killed by the boy.
A snake is killed by the boy with a stick.
Answer is Right!
Answer is Wrong!
The correct answer is A. The snake was killed by the boy with a stick.
B is incorrect because the stick is the instrument that was used to kill the snake, not the one who killed the snake.
C is incorrect because the snake and the stick are not combined into a single entity.
D is incorrect because the sentence is in the present tense, but the action of killing the snake has already happened.
The sentence “The boy killed the snake with a stick” can be paraphrased as “The boy used a stick to kill the snake.”