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The efficiency (E)  and speed up (sp) for Multiprocessor with p processors satisfies:

  1. $ E \leq p \text{ and } s_p \leq p$
  2. $ E \leq 1 \text{ and } s_p \leq p$
  3. $ E \leq p \text{ and } s_p \leq 1$
  4. $ E \leq 1 \text{ and } s_p \leq 1$
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Efficiency E can never be more than 1 or 100%  even 1 is just theortical

Speed up for multiprocessor Sp can never exceed ( P) no of processors

hence E1 and spp E≤1 and sp≤p

so ans is B

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