Fill in the blank with the appropriate word.
We can only __________ to a few of the measures which received his efficient support

Correct option is A

The correct option to fill in the blank is (a) allude.
Explanation:
The verb “allude” means to make an indirect reference or mention something briefly. (संकेत करना, परोक्ष रूप से बताना)
In the sentence, the speaker is indirectly referring to some measures — so “allude” is contextually correct.
Example:
· The professor alluded to a few key points without going into detail.
Why other options are incorrect:
· b) Prelude – an introduction (पूर्वाभास); noun, not a verb
· c) Prude – a person easily shocked by sexual matters (संकोची व्यक्ति); irrelevant
· d) Exude – to give off or emit (स्रावित करना); grammatically and contextually incorrect