In the question below, a statement has been given with a word omitted. Following the statement are five words that may fit in the blank. Choose the most appropriate word to make the statement contextually meaningful and grammatically correct.

The professor provided an _________________ lecture that clarified the complex scientific concepts for the students.

Correct option is B

The most appropriate word to fill in the given blank will be “explanatory." The word "explanatory" is directly related to the act of providing explanations or making things clear. In this context, the professor's lecture is intended to elucidate and simplify complex scientific ideas, making them easier for the students to understand.
The other options are incorrect:
(a) confusing - causing a lack of clarity or understanding; making things difficult to comprehend.
(b) explanatory - providing explanations or information that helps understand something; making complex ideas or concepts clear.
(c) futile - incapable of producing any useful result; ineffective; pointless.
(d) rigid - stiff, inflexible, or unyielding; not easily bent or changed.
(e) spirituality - related to matters of the spirit or soul; concerns the search for a sense of purpose, meaning, or connection beyond the material world.