How do the Pevensie children get to Narnia?

Here is the question :

HOW DO THE PEVENSIE CHILDREN GET TO NARNIA?

Here is the option for the question :

Through a window
Through a wardrobe
On a train
Flying a balloon

The Answer:

And, the answer for the the question is :

Through a wardrobe

Explanation:

[STC0016682]. During World War II, when the Pevensie children are taking refuge in the countryside, Lucy Pevensie discovers a wardrobe in the home of her guardian. As soon as she steps through the wardrobe, she is whisked away to the enchanted kingdom of Narnia, where she and her brothers eventually come face to face with natives such as Mr. Tumnus and Aslan, the lion. C.S. Lewis, author of “The Chronicles of Narnia,” was also known for taking in displaced children at his country estate during the war.