How to solve pls once show steps...

this question is taken from stats portion and not looking so important. you dont need to pay much attention for these type of questions

see

you can visit this link https://math.stackexchange.com/questions/1098004/what-is-the-value-of-lim-n-to-infty-sum-j-n4n-4n-choose-j-bigl-fr/1098320#1098320

see this attachment option c is correct