Aquino is to Marcos as what is to Estrada?

In understanding the relationships presented in the question, we look at the historical context of the Philippine government and its leadership. Aquino and Marcos refer to significant figures in Philippine history, where Benigno Aquino Jr. was a prominent opposition figure against Ferdinand Marcos, the former president who was known for his authoritarian rule. The relationship here illustrates a contrast between a leader and a key opponent or challenger.

Following this pattern, we seek a similar contrast with the figure of Joseph Estrada. He served as president after Aquino and was succeeded by Gloria Macapagal Arroyo following Estrada's ousting. However, if we look for a leader who directly contrasts with Estrada in a significant political manner, we turn to Fidel Ramos, who previously served as president before Estrada. Ramos was known for his different governance style and was part of a transitional character in the politics of the Philippines, bridging ties between various administrations.

Choosing Ramos as the answer creates a parallel: just as Aquino challenged the presidency of Marcos, Ramos represented a contrasting leadership dynamic compared to Estrada, who faced significant challenges during his own presidency. This connection solidifies the relationship between the figures, supporting the selection of Ramos as the correct answer.