Correct Option: A

<th> element is used for representing heading of column or a row. It works same as <td> element. If shell has no content we can use <th> element also there. We can use scope attribute for specifying the heading is for row or column. Usually content of <th> is represented in bold. <thead> tag contains the group of header. <tr> is used to indicate start of every row i.e. it stands for table row.