MCQ
The set of all prime numbers is
- Aan infinite set
- Ba singleton set
- Ca multi set
- Da finite set
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$(A)$ vertex is $\left(\frac{2 a}{3}, 0\right)$ $(B)$ directrix is $x=0$
$(C)$ latus rectum is $\frac{2 a}{3}$ $(D)$ focus is $(a, 0)$