Question

Which sentence is wrong because it's not parallel? because the teachers thought the seniors' prank was funny, the seniors neither received a severe punishment nor escaped punishment completely. because the teachers thought the seniors' prank was funny, it resulted neither in severe punishment nor in lack of punishment. because the teachers thought the seniors' prank was funny, it resulted neither in severe punishment nor letting them off scot-free. because the teachers thought the seniors' prank was funny, it resulted neither in giving them a severe punishment nor in letting them off scot-free?

Answer 1

"Because the teachers thought the seniors' prank was funny, it resulted neither in severe punishment nor letting them off scot-free," is wrong because of the "letting." 

Parallelism is the use of pieces in a sentence that are similar in sound, meaning, etc. The -ing in "letting" isn't similar with the rest of the sentence.