Analysing the procedure described, it is CORRECT to state: The compound potassium hydrogen phthalate is a secondary standard and the NaOH solution...

Analysing the procedure described, it is CORRECT to state:

The compound potassium hydrogen phthalate is a secondary standard and the NaOH solution is a primary standard.
The compound potassium hydrogen phthalate is a primary standard and the NaOH solution is a secondary standard.
The compound potassium hydrogen phthalate and the NaOH solution are primary standards.
The compound potassium hydrogen phthalate and the NaOH solution are secondary standards.
The compound potassium hydrogen phthalate is a secondary standard and the NaOH solution cannot be used as a standard for the HCl solution.
A) 1
B) 2
C) 3
D) 4
E) 5