Given below are two statements:
Statement $I$: Penicillin is a bacteriostatic type of antibiotic.
Statement $II$: The general structure of Penicillin is as shown below:
$R-CONH-CH-CH-S-C(CH_3)_2-CH-COOH$ (with a $\beta$-lactam ring fused to a thiazolidine ring).
Choose the correct option:

• A
  Statement $I$ is correct but statement $II$ is false
• B
  Statement $I$ is incorrect but statement $II$ is true
• C
  Both statement $I$ and statement $II$ are false
• D
  Both statement $I$ and statement $II$ are true