Answer:
A. Germanium
Explanation:
Germanium is the only semi-conductor out of the four because aluminum and tin are conductors and iodine is an insulator.
The element that is a semiconductor is germanium. The correct option is A.
Semiconductors are substances with specialized electrical properties and can be used as the basis for computers and other electronic devices. Typically, it is a solid chemical element or compound that, in some circumstances, transmits electricity but not in others.
Germanium is an element of the periodic table that is grayish black, and it is hard and brittle. It is a semiconductor because it contains four electrons in the valence shell.
Examples of most commonly used semiconductors are Gallium arsenide, germanium, and silicon. Tin, iodine, and aluminum are not semiconductors. They are metals and nonmetals.
Thus, the correct option is A. germanium.
To learn more about semiconductors, refer to the link:
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