$A$ single ejaculation contains $...A...$ to $...B...$ million spermatozoa. Semen has a pH of $...C...$ to $...D...$. Its alkalinity helps to neutralize the acidity of the urethra. Here $A, B, C$ and $D$ refer to:

• A
  $A-300, B-400, C-8, D-9$
• B
  $A-200, B-300, C-7.35, D-7.50$
• C
  $A-100, B-200, C-5, D-6$
• D
  $A-150, B-200, C-7, D-8$