That is an inspirational story! Thank you for writing. Please do post such good blogs in future as well.

Thank you for answering my stupid doubts! Mansoor Ameen

Which one is a closure? function a or function b or function c or function d ? Which one ? If not function then from which part to which part, I should say that it is closure? Mansoor Ameen

Now if you combine all those functions (not one, but all) with each of their lexical environment, that is called Closure! Explain this in the code please.