Microprocessor
The program counter in a 8085 micro-processor is a 16-bit register, because

 It counts 16-bits at a time
 There are 16 address lines
 It facilitates the user storing 16-bit data temporarily
 It has to fetch two 8-bit data at a time

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Microprocessor
DS directive in 8085

Forces the assembler to reserve a specified number of bytes in the memory
Forces the assembler to reserve a specified number of consecutive bytes in the memory
None of these
Forces the assembler to reserve one byte of memory

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