Given below are four logic gates symbol (figure). Those for OR, NOR and NAND are respectively

Options

A. 1, 4, 3
B. 4, 1, 2
C. 1, 3, 4
D. 4, 2, 1

Answer

To solve the problem of identifying the symbols for the OR, NOR, and NAND gates among the given logic gate symbols, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Basic Logic Gates**:
- The three basic logic gates are OR, AND, and NOT.
- We need to find the symbols for OR, NOR, and NAND gates.

2. **Identify the OR Gate**:
- The OR gate symbol typically has a curved shape on the input side and a pointed end on the output side.
- Look for the symbol that matches this description. This will be the first symbol.

3. **Identify the NOR Gate**:
- The NOR gate is a combination of an OR gate followed by a NOT gate.
- To identify the NOR gate, look for the OR gate symbol with a small circle (representing NOT) at the output end. This will be the second symbol.

4. **Identify the NAND Gate**:
- The NAND gate is a combination of an AND gate followed by a NOT gate.
- The AND gate symbol typically has a flat input side and a pointed output side. Look for the AND gate symbol with a small circle at the output end. This will be the third symbol.

5. **List the Identified Gates**:
- Based on the identification:
- The first symbol corresponds to the OR gate.
- The second symbol corresponds to the NOR gate.
- The third symbol corresponds to the NAND gate.

6. **Select the Correct Option**:
- From the identification, we can conclude that the correct sequence of symbols for OR, NOR, and NAND gates is 1 (OR), 3 (NOR), and 4 (NAND).
- Therefore, the correct answer is option C.

### Final Answer:
The symbols for OR, NOR, and NAND gates are respectively:
- OR gate: Symbol 1
- NOR gate: Symbol 3
- NAND gate: Symbol 4