The demonstration passed off peacefully.

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option. My sister's marriage passed _____ peacefully.

n the following questions, each sentence given with blanks is to be filled in with an appropriate word. Select the correct alternative out of the four. My sister's marriage passed _____peacefully.

Who demonstrated photolysis of water ?