In microprocessor's stack what does the operation push cx means

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In microprocessor's stack, what does the operation push cx means?

A. Ch = [sp - 1], cl = [sp - 2] and sp = sp - 2

B. Ch = [sp], cl = [sp - 1] and sp = sp - 2

C. Ch = [sp + 1], cl = [sp] and sp = sp + 2

D. Ch = [sp], cl = [sp + 1] and sp = sp + 2

Answer: Option A

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