Improve the bracketed part of each sentence.
(No sooner the advertisement regarding the launch of new smart phone apeared) than there was a rush on the online website for prebooking the same.

Options

A. No sooner the advertisement regarding the launched of new smart phone appeared
B. No sooner did the advertisement regarding the launch of new smart phone appeared
C. The advertisement regarding the launch of new smart phone was no sooner having appeared
D. No improvement

Explanation

Here, No sooner did the advertisement regarding the launch of new smart phone appear………..should be used.