The question asks to determine the value of 1 Petabyte (PB) in Bytes.

Petabyte Conversion Explained

Data storage units often use binary prefixes based on powers of 2. The standard prefixes are:

• KiloByte (KB) = $2^{10}$ Bytes
• MegaByte (MB) = $2^{20}$ Bytes
• GigaByte (GB) = $2^{30}$ Bytes
• TeraByte (TB) = $2^{40}$ Bytes
• PetaByte (PB) = $2^{50}$ Bytes
• ExaByte (EB) = $2^{60}$ Bytes

Calculating Petabyte Value

Following the pattern of binary prefixes, the prefix 'Peta' corresponds to $2^{50}$. Therefore, 1 Petabyte is equal to $2^{50}$ Bytes.

Final Answer Derivation

Based on the standard definition of binary prefixes used in computing:

1. 1 Petabyte (PB) is defined using the Peta prefix.
2. The Peta prefix represents $2^{50}$.
3. Thus, 1 PB = $2^{50}$ Bytes.

This matches Option B.