The correct option is "1 only" because the Cabinet Mission of 1946 indeed recommended a federal structure for India, suggesting a unified but autonomous system where provinces would have significant powers. However, it did not specifically address the enlargement of powers of Indian courts or increase Indian representation in the Indian Civil Services (ICS), which were not its primary focus. The Mission aimed to facilitate a transfer of power to Indian leaders while ensuring political stability, emphasizing a federal arrangement as a means to appease the varying interests of different political groups in India.