Identify the correct labeling in the diagram of a human ovary.

• A
  $a$ - Blood vessel,$b$ - Primary follicle,$c$ - Tertiary follicle,$d$ - Graafian follicle,$e$ - Ovum,$f$ - Corpus luteum
• B
  $a$ - Primary follicle,$b$ - Blood vessel,$c$ - Tertiary follicle,$d$ - Graafian follicle,$e$ - Ovum,$f$ - Corpus luteum
• C
  $a$ - Blood vessel,$b$ - Primary follicle,$c$ - Tertiary follicle,$d$ - Ovum,$e$ - Graafian follicle,$f$ - Corpus luteum
• D
  $a$ - Ovum,$b$ - Graafian follicle,$c$ - Corpus luteum,$d$ - Blood vessel,$e$ - Primary follicle,$f$ - Tertiary follicle