Match List - I with List - II.
| List - I | List - II |
| (A) NAND Gate | (I)  |
| (B) OR Gate | (II)  |
| (C) NOR Gate | (III)  |
| (D) AND Gate | (IV)  |
Choose the correct answer from the options given below :
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Each gate is recognised by its symbol shape: an AND gate has a flat input side and a rounded output side, an OR gate has a curved input side and a pointed output. A small circle (bubble) at the output means the result is inverted (NOT), turning AND into NAND and OR into NOR.
(A) NAND Gate — this matches (III). It is the AND shape with a bubble at the output.
(B) OR Gate — this matches (IV). It is the OR shape without a bubble.
(C) NOR Gate — this matches (I). It is the OR shape with a bubble at the output.
(D) AND Gate — this matches (II). It is the AND shape without a bubble.