What gate is obtained by connecting the output of an OR gate to the input of a NOT gate?

Correct option is C

​$$\bullet \text{An \textbf{OR gate} gives output:} \quad Y = A + B\\[10pt]\bullet \text{A \textbf{NOT gate} inverts the output:} \quad \text{Final Output} = \overline{A + B}\\[10pt]\bullet \text{This is the logical expression for a \textbf{NOR gate}.}$$​​