$A$ carrier signal of frequency $1.5 MHz$ has an amplitude of $50 V$. It is amplitude modulated by a modulating wave of frequency $10 kHz$ with a modulation index of $50 \%$. What are the frequencies of the $LSB$ and $USB$?
- A$1490 kHz, 1510 kHz$
- B$1510 kHz, 1490 kHz$
- C$\frac{1}{1490} kHz, \frac{1}{1510} kHz$
- D$\frac{1}{1510} kHz, \frac{1}{1490} kHz$
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