Final answer:
The claim relating to a '3. 5. 7 code flag of the Netherlands' is false as there is no such widely recognized code or numbering system linked to the design of the Dutch flag, which consists of red, white, and blue horizontal stripes.
Step-by-step explanation:
The statement "3. 5. 7 code flag of the Netherlands" is not clear in its meaning and seems to refer to an undefined or incorrect concept. Therefore, the answer is false. When referring to the flag of the Netherlands, it is important to recognize that the national flag consists of three horizontal bands of color: red on the top, white in the middle, and blue on the bottom.
This design does not directly associate with the numbers 3, 5, or 7. Instead, the Dutch flag is simply known for these three colors, and there is no widely recognized code or numbering system related to the Dutch flag.