• Statement (I) is False: Plant cells are generally larger than animal cells (typical plant cell diameters range from $10\text{ to }100\ \mu\text{m}$, whereas typical animal cells range from $10\text{ to }30\ \mu\text{m}$). The extensive size of plant cells is largely accommodated by their large central vacuole, which maintains turgor pressure.
• Statement (II) is True: The standard diameter range for mature differentiated plant cells is indeed between $10\ \mu\text{m}$ and $100\ \mu\text{m}$.
• Conclusion: Statement (I) is false but Statement (II) is true.

Correct option: (4) Statement (I) is false but Statement ({I) is true.