An amplitude modulated signal is given by $\mathrm { V } ( \mathrm { t } ) = 10 \left[ 1 + 0.3 \cos \left( 2.2 \times 10 ^ { 4 } \mathrm { t } \right) \right] \sin \left( 5.5 \times 10 ^ { 5 } \mathrm { t } \right)$. Here t is in seconds. The sideband frequencies (in kHz) are, [Given $\pi = 22/7$]\\
(1) 1785 and 1715\\
(2) 178.5 and 171.5\\
(3) 89.25 and 85.75\\
(4) 892.5 and 857.5