To close one eye briefly.
To close two eyes briefly.
To bob the head up and down.
To shake the head from side to side.
Source: স্থানীয় সরকার প্রকৌশল অধিদপ্তর (LGED) - কার্যসহকারী (14-07-2023)
Answer: To close one eye briefly.
Explanation:
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