Step 1: Identify BHA.
BHA stands for Butylated Hydroxyanisole, which is a synthetic antioxidant commonly used as a food preservative. Step 2: Recall its molecular formula.
The molecular formula of BHA is \(\mathrm{C_{11}H_{16}O_2}\). Step 3: Conclusion.
Hence, the correct formula of BHA is \(\mathrm{C_{11}H_{16}O_2}\).