Each instruction in ARM machine is encoded into...........wordSelect one:a. 16 Byteb.  2 Bytec. 4 Byted. 8 Byte

Break Down the Problem

1. We need to determine the size of an encoded instruction in ARM architecture.
2. Evaluate the options provided to find the correct one.

Relevant Concepts

• ARM architecture encodes instructions in specific formats, commonly 16-bit or 32-bit formats, depending on the type of ARM architecture used (e.g., ARM or Thumb).

Analysis and Detail

1. Option a (16 Byte): This is too large for a single instruction.
2. Option b (2 Byte): This aligns with the Thumb instruction set, where some instructions are indeed 2 bytes.
3. Option c (4 Byte): This is the size for a standard ARM instruction in the ARM instruction set.
4. Option d (8 Byte): This is also too large for a single instruction.

Verify and Summarize

• The typical size for a standard ARM instruction is 4 bytes, while Thumb instructions can be 2 bytes.
• Since the question asks about "each instruction," the likely answer refers to the ARM instruction size.

Final Answer

c. 4 Byte