Explanation:

To determine the largest unit of storage among the given options, we need to understand the hierarchy of digital storage units. These units are based on powers of $2$ (binary) or powers of $10$ (decimal, often used for marketing capacity): - $\text{KB (Kilobyte)} \approx 10^3 \text{ bytes}$ (specifically $2^{10} = 1024 \text{ bytes}$) - $\text{MB (Megabyte)} \approx 10^6 \text{ bytes}$ (specifically $2^{20} = 1,048,576 \text{ bytes}$) - $\text{GB (Gigabyte)} \approx 10^9 \text{ bytes}$ (specifically $2^{30} = 1,073,741,824 \text{ bytes}$) - $\text{TB (Terabyte)} \approx 10^{12} \text{ bytes}$ (specifically $2^{40} = 1,099,511,627,776 \text{ bytes}$) \nComparing these values, a Terabyte (TB) is significantly larger than a Gigabyte (GB), Megabyte (MB), or Kilobyte (KB). Therefore, option (d) TB is the largest unit of storage listed. \nOption (a) GB (Gigabyte): A Gigabyte is $1024$ Megabytes, which is smaller than a Terabyte. \nOption (b) KB (Kilobyte): A Kilobyte is $1024$ bytes, making it the smallest unit among KB, MB, GB, and TB. \nOption (c) MB (Megabyte): A Megabyte is $1024$ Kilobytes, which is larger than a Kilobyte but smaller than a Gigabyte and Terabyte. \nOption (e) None of these: This is incorrect as TB is clearly the largest unit among the choices provided.