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➷ There is one sodium atom present, one oxygen atom present and one hydrogen atom present.
Therefore, there are a total of 3 atoms in this compound meaning your answer is option C.
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Here is your answer
C.3
REASON:
There are three atoms in NaOH
namely
1 atom of Sodium(Na)
1 atom of Oxygen
1 atom of Hydrogen
So, a total of three atoms
HOPE IT IS USEFUL