The script of Indus Valley Civilisation was written from :

Right to left

The correct answer is Option (1) → Right to left

While there are ongoing debates and discussions about the direction and interpretation of the script of the Indus Valley Civilization, it's true that some evidence suggests that the script may have been written from right to left in addition to other possible directions.

The Indus script remains undeciphered, and scholars continue to investigate its various aspects.

So, the correct option is [1].