If ${N_a} = [an:n \in N\} ,$ then ${N_5} \cap {N_7} = $
If ${N_a} = [an:n \in N\} ,$ then ${N_5} \cap {N_7} = $
- A
${N_7}$
- B
$N$
- C
${N_{35}}$
- D
${N_5}$
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