Which of the following is the conventional representation of hexagonal headed bolt?

• A. <img alt="The conventional representation of hexagonal headed bolt - option a" class="alignnone size-full wp-image-300715" height="133" sizes="(max-width: 384px) 100vw, 384px" src="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1a.png 384w, https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1a-300x104.png 300w" width="384"/>
• B. <img alt="The conventional representation of hexagonal headed bolt - option b" class="alignnone size-full wp-image-300716" height="138" sizes="(max-width: 383px) 100vw, 383px" src="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1b.png 383w, https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1b-300x108.png 300w" width="383"/>
• C. <img alt="The conventional representation of hexagonal headed bolt - option c" class="alignnone size-full wp-image-300717" height="126" sizes="(max-width: 357px) 100vw, 357px" src="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1c.png 357w, https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1c-300x106.png 300w" width="357"/>
• D. <img alt="The conventional representation of hexagonal headed bolt - option d" class="alignnone size-full wp-image-300718" height="111" sizes="(max-width: 363px) 100vw, 363px" src="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1d.png 363w, https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q1d-300x92.png 300w" width="363"/>