Question

The symbolic representation of four logic gates are given below. The logic symbols for OR, NOT and NAND gates are respectively:

(A) (i),(iii),(iv)
(B) (iii),(iv),(ii)
(C) (iv),(i),(ii)
(D) (iv),(ii),(i)

Answer 1

Hint :In order to find the correct answer for this question, we will recall the theory of logic gates. We will also recall the symbolic representation of logic gates. We will discuss the most basic of all the logic gates and will compare their symbolic representation with those given to us in the question above.

Complete Step By Step Answer:
Logic gates can be considered as the basic building blocks of any digital system. The logic gates come into play when we have more than one input to a circuit and we want only one particular output corresponding to the inputs.
The word logic comes as the relationship between the input and output is based on a certain logic and based on that, the names are given to the different kinds of logic gates such as AND gate, OR gate, NOT gate etc.
In order to find the correct answer for the above question, we will look upon few of the logic gates and their symbolic representation

Therefore, from the above shown symbols of the logic gates, we can conclude that the correct answer to our question is option (D).

Note :
The most basic logic gates are the OR, AND and Not gates. The other gates can be fabricated with the use of these three basic gates. Another way of solving this question is comparing each gate's truth table with the ones that are asked.