What is the size of the instruction LDA 1234h? A) 1byte B) 2byte C) 3byte D) 4byte

The size of the instruction LDA 1234h is 3 bytes. So, the answer is C) 3byte.

Here's why:

1. LDA is an opcode that stands for "Load Accumulator". This opcode is used in assembly language programming. The size of this opcode is 1 byte.

2. 1234h is a hexadecimal number. In assembly language, hexadecimal numbers are used to represent memory addresses. The size of this hexadecimal number is 2 bytes.

3. Therefore, when you combine the opcode and the hexadecimal number, the total size of the instruction LDA 1234h is 3 bytes (1 byte for the opcode + 2 bytes for the hexadecimal number).