Questions

A practice to learn something is a Lesson.

Mercury was the remedy of choice for syphilis in Protestant Europe. Until the early 20th century, the primary treatment for syphilis was mercury, in the form of calomel, ointments, steam baths, pills, and other concoctions.

Mercury was already being used in Western Europe to treat skin diseases.

Harappan or Indus Valley Civilization was the first and ancient civilization which started in what now Pakistan and North West India.

The Harappan civilization existed between 3300 BC and 1300 BC.

The ruins of Mohenjo-daro is a major archaeological site that was built by this civilization and is now a UNESCO World Heritage Site.

Answer: U

Explanation:   Starting on the left, and moving along the line to the right, letters follow the alphabetic sequence, in steps of 1,2,3 and then 4, before repeating the sequence.

The main difference lies in the motive of the two parties. The main motive of the hedger is to hedge(minimize) the risk from the occurence of some events. 

The motive of the speculator is to gamble in the market in order to make the profit by buying/selling the derivative products.