What was the standardized ratio of Harappan bricks?

The ratio was 4:2:1 (Length:Breadth:Height), maintained from the Himalayas to the Arabian Sea.

Harappan City Planning: Roads and Brick Uniformity

Q: Consider the following statement(s) about Harappan cities: 1. Roads were not always absolutely straight and did not always cross one another at right angles. 2. A striking feature is the uniformity in the average size of the bricks for houses and for city walls. Which of the statement(s) given above is/are correct?

Harappan cities featured generally grid-like roads with some deviations and used remarkably standardized bricks in a 4:2:1 ratio for all construction.

ID: HIS_ANC_2016_229 Ref: Standard Educational Reference

Consider the following statement(s) about Harappan cities:
1. Roads were not always absolutely straight and did not always cross one another at right angles.
2. A striking feature is the uniformity in the average size of the bricks for houses and for city walls.
Which of the statement(s) given above is/are correct?