IMAGEN RESPONSIVE BOOSTRAP code example
Example 1: image responsive bootstrap 4
<img class="img-fluid" src="" alt=""> //This will make your image responsiveExample 2: bootstrap img src
<img src="..." class="rounded mx-auto d-block" alt="..."><img class="img-fluid" src="" alt=""> //This will make your image responsive<img src="..." class="rounded mx-auto d-block" alt="...">