What is Fick s second law of diffusion?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q4a.png"><img alt="Ficks second law of diffusion - option a" class="size-full wp-image-239161" height="45" src="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q4a.png" width="86"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q2a.png"><img alt="Ficks second law of diffusion - option b" class="size-full wp-image-239157" height="46" src="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q2a.png" width="94"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q2c.png"><img alt="Ficks second law of diffusion - option c" class="size-full wp-image-239159" height="44" src="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q2c.png" width="69"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q4d.png"><img alt="Ficks second law of diffusion - option d" class="size-full wp-image-239162" height="46" src="https://www.sanfoundry.com/wp-content/uploads/2018/05/engineering-materials-metallurgy-questions-answers-ficks-law-carbon-steels-q4d.png" width="77"/></a>