In the given diagram of human sperm,identify the functions of the labelled parts $A$,$B$ and $C$.

• A
  $A \rightarrow$ Helps in penetration of sperm into ovum,$B \rightarrow$ Helps in movement of sperm,$C \rightarrow$ provides energy for the movement of sperms into the female reproductive tract.
• B
  $A \rightarrow$ Helps in penetration of sperm into ovum,$B \rightarrow$ Provides energy for the movement of sperm,$C \rightarrow$ Helps in movement of sperm.
• C
  $A \rightarrow$ Helps in movement of sperm,$B \rightarrow$ Helps in penetration of sperm into ovum,$C \rightarrow$ provides energy for the movement of sperms.
• D
  $A \rightarrow$ Provides energy for the movement of sperm,$B \rightarrow$ Helps in movement of sperm,$C \rightarrow$ Helps in penetration of sperm into ovum.