Correct Answer - Option 4 : Both 1 and 2 are implicit.
Given,
Statement:
As part of the city's beautification campaign, the local municipal body plans to clean up the old lake in the city center.
Assumptions:
1. If the lakes are well maintained, then it adds to the beauty of the city and checks the water level of that area.
2. The lake is full of dirt.
Here we see both the assumptions are implicit.
Hence, the correct answer is Both 1 and 2 are implicit.