How can you create a radio button group in HTML such that only one option can be selected at a time?(a) Use multiple <input> tags of type radio with the same name attribute.(b) Nest radio buttons within a <fieldset> element.(c) Employ JavaScript to control selection behavior.(d) Radio buttons are inherently single-selection by default.

The correct answer is (a) Use multiple <input> tags of type radio with the same name attribute.

Here is a step-by-step guide on how to create a radio button group in HTML:

1. Start by creating a form using the <form> tag. This is not necessary for creating radio buttons, but it's a good practice as forms provide a way to group inputs and buttons logically.

<form>
</form>

2. Inside the form, you can start creating your radio buttons. Each radio button in HTML is created using the <input> tag with the type attribute set to "radio".

<form>
  <input type="radio">
</form>

3. To make sure only one radio button can be selected at a time, you need to give all the radio buttons in the group the same name attribute. The browser will then treat them as a single group and ensure only one can be selected.

<form>
  <input type="radio" name="option">
  <input type="radio" name="option">
</form>

4. Finally, you can provide a value for each radio button using the value attribute. This will be the value sent when the form is submitted if this radio button is selected.

<form>
  <input type="radio" name="option" value="option1">
  <input type="radio" name="option" value="option2">
</form>

So, the answer (a) is correct. The other options (b), (c), and (d) are not necessarily incorrect, but they are not the primary method for creating a group of radio buttons where only one can be selected at a time.