The correct option is B He was so impressed by the beauty of the statue that he felt like falling down to his knees to worship it.
Option A puts a part of the predicate before the sentence, which is functional, but not the structurally perfect. Hence, it is incorrect. Option C conveys that he was struck by the beauty of the statue when he fell to his knees, which is not the actual meaning. Option D does not arrange the words in a proper order to form a complete sentence, hence it is wrong. Option B, which is structurally perfect and conveys a complete meaning, is correct.