Correct option is A
In the Vicat apparatus,
normal consistency is defined as the consistency at which the Vicat needle penetrates to a depth of
33 to 35 mm. This measurement ensures that the paste has the appropriate consistency for testing the setting time and other properties of cement.
33 to 35 mm: Correct, as it represents the standard penetration depth for normal consistency.
23 to 25 mm: Refers to a different consistency level.
5 to 10 mm: Indicates a more fluid consistency.
1 mm: Represents a very stiff consistency.
Therefore, the correct answer is (a) 33 to 35 mm.