Concave Mirror and definition of Pole

Question 99 A concave mirror is
A>  is curved inwards
B>   is curved outwards
C>  is curved to both sides
D> is a plain mirror
Answer: is curved inwards

Question 100 Which one is true:
A> The centre of the reflecting surface of a spherical mirror is a point called the pole.
B> The extreme left of mirror is called pole.
C> The extreme right point of spherical mirror is called the pole.
Answer : The centre of the reflecting surface of a spherical mirror is a point called the pole.

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