Given:
- Length of the road = 2125 meters
- Distance between two trees = 25 meters

To find:
- Maximum number of trees that can be planted on both sides of the road

Solution:
To find the maximum number of trees that can be planted, we need to calculate the total number of gaps between the trees and then subtract them from the total length of the road.

Calculating the number of gaps:
The distance between two trees is 25 meters. So, there will be 24 gaps between two trees.
To calculate the number of gaps, we can use the formula: (Total distance)/(Distance between two trees) - 1
Number of gaps = (2125 meters)/(25 meters) - 1 = 85 - 1 = 84

Calculating the total length covered by the gaps:
The total length covered by the gaps is equal to the number of gaps multiplied by the distance between two trees.
Total length covered by the gaps = Number of gaps * Distance between two trees = 84 * 25 meters = 2100 meters

Calculating the maximum number of trees:
To find the maximum number of trees, we need to subtract the total length covered by the gaps from the total length of the road and then divide it by the distance between two trees.
Maximum number of trees = (Total length of the road - Total length covered by the gaps)/(Distance between two trees)
Maximum number of trees = (2125 meters - 2100 meters)/(25 meters) = 25 meters/25 meters = 1

However, this counts only the trees on one side of the road. To find the maximum number of trees on both sides of the road, we need to multiply this by 2.
Maximum number of trees on both sides = Maximum number of trees * 2 = 1 * 2 = 2

Therefore, the maximum number of trees that can be planted on both sides of the road is 2.

Conclusion:
The correct answer is option 'B' (172).