Basic function of SiO2 is— (i) Physical strength (ii)

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Basic function of SiO₂ is—
(i) Physical strength
(ii) Isolation
(iii) Passivation from external contaminants
(iv) Electrical connection
(v) Selective diffusion

1. (ii) only
2. (iii) and (v) only
3. (ii), (iii) and (v) only
4. All

Correct Option: C

The Basic function of SiO₂ is
* Isolation
* Passivation from external contaminants
* Selective diffusion