Fill in the blank with the correctly spelt word.
The speaker was lauded for her ______ delivery, responding without notes.

Correct option is B

Option (b) is the correctly spelt word.
Correct spelling is: “ extemporaneous” — spoken or performed without prior preparation; impromptu; off-the-cuff. (Hindi: बिना तैयारी का / आकस्मिक / तात्कालिक)
Example: Her extemporaneous remarks after the keynote impressed the audience.