Have sent my doubt on whatsapp

#1

have sent my doubt on whatsapp

#2

Okay use this in ifram1.html:
<iframe id="frame1" frameborder="0" width="500" height="400" src="./iframes2.html"> </iframe>
Here you were using iframe2.html in src instead of ./iframes2.html
and in iframes2.html use:
<iframe id="frame1" frameborder="0" width="500" height="400" src="./iframe1.html"> </iframe>

#3

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