Select the most appropriate option to fill in the blank.

Gandhiji spent many years _______ Sabarmati Ashram.

at

The most appropriate option to fill in the blank is at.

The word at can be used to indicate a location or a period of time. In this case, the sentence is saying that Gandhiji spent many years at Sabarmati Ashram. This means that Gandhiji lived and worked at Sabarmati Ashram for many years.

The other options are not correct.

• With means in the company of. It cannot be used in this sentence because it does not describe a location or a period of time.
• By means near or beside. It cannot be used in this sentence because it does not describe a location or a period of time.
• On means in contact with or supported by. It cannot be used in this sentence because it does not describe a location or a period of time.