Answer: The correct answer is 1.8 M NaOH.
Step-by-step explanation:
The balanced chemical reaction for the neutralization of NaOH with HCl follows:

To calculate the molarity of the NaOH for neutralization, we use the equation:

where,
are the molarity and volume of HCl.
are the molarity and volume of NaOH.
We are given:

Putting values in above equation, we get:

Hence, the correct answer is 1.8 M NaOH.