What is beryllium oxide? a potentially toxic chemical found in thermal grease used for the processor’s heatsink
a nontoxic chemical found in the glass of cathode ray tube monitors
a potentially toxic chemical found in the plastic used to make a computer case
a nontoxic chemical used in the manufacturing of computer batteries

a potentially toxic chemical found in thermal grease used for the processor’s heatsink

Explanation:

Exposure to Beryllium oxide can lead to it being inhaled which can cause irritations to the nose, lungs and throat. If this exposure is prolonged, a more serious condition known as Berylliosis which can lead to lung damage. This makes it a potentially toxic chemical.

Beryllium oxide is useful in electronic production due to it having good thermal conductivity whilst also possessing good insulation properties in relation to electricity. This enables it to be used as a filler in thermal grease.