Hello Aamir
I’m not sure where you got that particular quote, but it seems that even though it is accurate, it is out of date. Before IOS 12.1, the adjacency would be dropped if after 3 minutes a reply to a query was not received. ALl the routes learned from that adjacency would also be removed. After IOS 12.1 however, the process has changed to eliminate the dropping of the adjacency. The difference is that now we have a new type of query called an SIA query.
You can find out the whole process in more detail in the following lesson:
I hope this has been helpful!
Laz