$A$ sinusoidal carrier voltage of frequency $1.5 \, MHz$ and amplitude $50 \, V$ is amplitude modulated by a sinusoidal voltage of frequency $10 \, kHz$ producing $50 \%$ modulation. The lower and upper side-band frequencies in $kHz$ are:
- A$1490, 1510$
- B$1510, 1490$
- C$\frac{1}{1490}, \frac{1}{1510}$
- D$\frac{1}{1510}, \frac{1}{1490}$
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