Which of these is a Frankel defect?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5a.png"><img alt="The following Frankel defect occurs due to a displacement of an ion - option a" class="alignnone size-full wp-image-202076" height="231" sizes="(max-width: 289px) 100vw, 289px" src="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5a.png 289w, https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5a-100x80.png 100w" width="289"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5b.png"><img alt="The following Frankel defect occurs due to a displacement of an ion - option b" class="alignnone size-full wp-image-202077" height="231" sizes="(max-width: 289px) 100vw, 289px" src="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5b.png 289w, https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5b-100x80.png 100w" width="289"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5c.png"><img alt="The following Frankel defect occurs due to a displacement of an ion - option c" class="alignnone size-full wp-image-202078" height="190" src="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5c.png" width="285"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5d.png"><img alt="The following Frankel defect occurs due to a displacement of an ion - option d" class="alignnone size-full wp-image-202079" height="191" src="https://www.sanfoundry.com/wp-content/uploads/2018/01/engineering-materials-metallurgy-questions-answers-crystal-defects-q5d.png" width="287"/></a>