Directions: In the following questions, the sentences have been given in Active/Passive voice. From the given alternatives, choose the one which best expresses the given sentence in Passive/Active voice. 

The beavers have built a perfect dam across the stream  

A person invests money in three different schemes for 6 years, 10 years and 12 years at 10%, 12% and 15% simple interest respectively. At the completion of each scheme, he gets the same interest. The ratio of his investments is-

Accounts in which shares of various companies are traded in electronic form are called:

Who has launched Green Charcoal Hackathon?

What are the main colors in photography?

Which famous British writer has died at the age of 89?

Select the most appropriate meaning of the given idiom.
 All eyes

Sin (45 + θ) – Cos (45 – θ) is: