Choose the correct option -
A sonorous element is _________.
Iron
Explanation for the correct option -
Option (C) Iron - Iron is a metal and has a sonority that can produce a ringing sound.
Explanation for the incorrect option -
Option (A) Hydrogen - Hydrogen is a non-metal that does not have the property of sonority.
Option (B) Oxygen - Oxygen is a non-metal that does not have the property of sonority.
Option (D) Phosphorous - Phosphorous is a non-metal that does not have the property of sonority.
Therefore, option (c) i.e. Iron is the correct answer.