How many fundamentals (Arkaan) are there in Islam?

(A) 3
(B) 5
(C) 7
(D) 9

The answer is: (B) 5
The five pillars of Islam are: (1) the shahada (or kalma), (2) salat (or namaz), (3) zakat (charity to the poor), (4) Fasting (or saum) and (5) Hajj (pilgrimage to Makkah).

To which Prophet the Psalms was revealed by God?

(A) Prophet Moses (A.S)
(B) Prophet Ibrahim (A.S)
(C) Prophet Jesus (A.S)
(D) Prophet David (A.S)

The answer is: (D) Prophet David (A.S)
The Psalms (Zabur) was revealed by Allah to Prophet David ( or Prophet Dawud (A.S)).

To which Prophet the Torah was revealed by God?

(A) Prophet Moses (A.S)
(B) Prophet Ibrahim (A.S)
(C) Prophet Jesus (A.S)
(D) Prophet David (A.S)

The answer is: (A) Prophet Moses (A.S)
The Torah (Tawrat) was revealed by Allah to Prophet Moses ( or Prophet Musa (A.S)).

To which Prophet the Gospel was revealed by God?

(A) Prophet Moses (A.S)
(B) Prophet Ibrahim (A.S)
(C) Prophet Jesus (A.S)
(D) Prophet David (A.S)

The answer is: (C) Prophet Jesus (A.S)
The Gospel (Injeel) was revealed by Allah to Prophet Jesus ( or Prophet Isa (A.S)).