Males have deeper voice when compared to females because of:

Ans: A (Long vocal cord) Ref: Diseases of the Ear, Nose and Throat by PL Dhingra, 5th edn., 2010, pg: 334Explanation:Both males and females have a high pitched voice in childhood.In males however after puberty the vocal cords lengthen and thicken and this leads to a lower pitched and deeper voice.The growth of the larynx is influenced by testosterone.Failure of this change in males leads to persistence of high pitched voice and is called as Puberophonia (Mutational Falsetto Voice).