Biomineralization is a process by which inorganic `metals' are incorporated in the body and made a pa of biological structures. Example of Biomineralization is seen in:

Ans. d. Mollusc shell (Ref en.wilkipedia.org/wiki/Biomineralization)The mollusc shell is a biogenic composite material that has been the subject of much interest in materials science because of its unusual propeies and its model character for biomineralization.Biomineralization is the process by which, living organisms produce minerals, often to harden or stiffen existing tissues. Such tissues are called mineralized tissues.