Which of the following indicates the set screw slot?

• A. <img alt="The conventional representation of hexagonal headed bolt - option a" 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"/>
• B. <img alt="The conventional representation of hexagonal headed bolt - option b" 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"/>
• C. <img alt="The conventional representation of hexagonal headed bolt - option c" class="alignnone size-full wp-image-300721" height="95" sizes="(max-width: 394px) 100vw, 394px" src="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q3c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q3c.png 394w, https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q3c-300x72.png 300w" width="394"/>
• D. <img alt="The conventional representation of hexagonal headed bolt - option d" class="alignnone size-full wp-image-300722" height="94" sizes="(max-width: 406px) 100vw, 406px" src="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q3d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q3d.png 406w, https://www.sanfoundry.com/wp-content/uploads/2020/12/engineering-drawing-questions-answers-conventional-symbols-nuts-bolts-q3d-300x69.png 300w" width="406"/>