The main changes that occurs in girls during puberty are: (i) Development of Adam's apple. (ii) Development of shrill voice. (iii) Production of testosterone increases. (iv) Hips become broaden and become more curved.

• A. (i) and (ii)                      
• B. (ii) and (iii)
• C. (ii) and (iv)                    
• D. (iii) and (iv)
• E. None of these