What ideological shift did the BJP make in its early days compared to the Jana Sangh?

Embracing Gandhian Socialism.

The correct answer is Option 1- Embracing Gandhian Socialism.

In the aftermath of the Emergency, the Bharatiya Jana Sangh had merged with the Janata Party. After the fall of the Janata Party and its break-up, the supporters of erstwhile Jana Sangh formed the Bharatiya Janata Party (BJP) in 1980. Initially, the BJP adopted a broader political platform than that of the Jana Sangh. BJP embraced ‘Gandhian’ Socialism’ along with cultural nationalism as its ideology. But it did not get much success in the elections held in 1984. After 1986, the party began to emphasise nationalism as the core of its ideology. The BJP also pursued the politics of ‘Hindutva’ for political mobilisation.