Select the most appropriate meaning of the given idiom.
A fly on the wall
392 6450f75568c22b088399ed85
Q:
Select the most appropriate meaning of the given idiom.
A fly on the wall
- 1A vigilant security guardfalse
- 2An unperceived observertrue
- 3Very intelligent personfalse
- 4An unwelcome guestfalse
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