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For 40 character wide lcd, the upper address range can go as high as:

 

For a 40-character-wide LCD, the upper address range is:

27H\boxed{27H}

Because the first line has 40 positions:

00H→27H00H \rightarrow 27H

Remember:

27H=3927H = 39

and counting from 0 to 39 = 40 characters.

Answer: A (c) only 0100111

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