Digital Electronics And Logic Gates

Step 1: Understanding logic gates.
An OR gate can be formed by combining NAND gates. Specifically, we need two NOT gates created from NAND gates and one additional NAND gate. This combination will produce the desired OR functionality.

Step 2: Conclusion.
The correct configuration requires two NOT gates obtained from NAND gates and one additional NAND gate. Therefore, the correct answer is option (2).