<!DOCTYPE html>
<html lang="en">
<head>
<title>Table with border conflict resolution with col</title>
<style>
table {
border-collapse: collapse;
}
td {
border: 1px solid black;
padding: 10px 20px;
}
</style>
</head>
<body>
<table>
<colgroup>
<col style="border: 5px solid black">
</colgroup>
<tbody>
<tr>
<td>A</td>
</tr>
<tr>
<td>B</td>
</tr>
<tr>
<td>C</td>
</tr>
<tr>
<td>D</td>
</tr>
</tbody>
</table>
</body>
</html>