AIIMS 2018 Physics Logic Gates MCQ Question

According to De Morgan's laws, the expression for an OR gate can be represented in terms of AND and NOT operations. Specifically, the law states that $A + B = \overline{\overline{A} \cdot \overline{B}}$, which means that the output is true if at least one input is true, aligning with option A. Other options do not correctly represent the OR operation or its equivalent forms under De Morgan's laws, thus failing to satisfy the logical condition of an OR gate. Understanding these laws is crucial for simplifying and analyzing digital circuits effectively.