Explanation:

- Option 1: Multiple parties had equal share of power:

- This is incorrect as the one-party dominant system in India was characterized by the clear dominance of one party.

- Multiple parties did not have an equal share of power during this time.

- Option 2: Dominance by a single party with minimal opposition:

- The Indian National Congress dominated post-independence Indian politics with significant influence and minimal effective opposition.

- This led to limited competition at the national level for several decades.

- Option 3: Frequent coalition governments:

- Coalition governments became more common later, when the dominance of a single party diminished.

- This was not characteristic of the one-party dominant era.

- Option 4: Regional parties dominated the political scene:

- While regional parties grew in importance over time, they did not dominate during the one-party dominant period.

- The central political scene was largely under Congress's control initially.