Central Board Of Secondary Education [CBSE] — science board exam of class 10th

I faced a problem in question number 10 (Second optional) of set 2.
The question is about a salt having ph 14 used in pakoras but only salt which is used in pakoras is baking soda but its ph is around 10 and because of the ph given in question, i identified it as caustic soda which might lead to a wrong answer due to incorrect data in question which confused me.