Identify the incorrect set from the following

Identify the incorrect set from the following
  1. $\mathrm{SiO}_2$, covalent solid, insulator, high melting point
  2. MgO , covalent solid, insulator, high melting point
  3. $\mathrm{H}_2 \mathrm{O}_{\text {(ice) }}$, molecular solid, insulator, low melting point
  4. $\mathrm{Ag}(\mathrm{s})$, metallic solid, conductor, high melting point

Asked in: AP EAMCET 2024 (21 May Shift 2)

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