Bishamber demanded a dowry of five thousand rupees.

Explanation:
Dowry is a social evil that is still prevalent in many parts of India. It is the practice of giving money, property or gifts by the bride's family to the groom's family at the time of marriage. It is often seen as a way to secure the bride's future in her husband's family. However, it has become a means of extortion and harassment by the groom's family in many cases.

In the story "The Proposal" by Anton Chekhov, Bishamber is a young man who is interested in marrying Lomov's daughter. When he visits Lomov to propose marriage, he demands a dowry of five thousand rupees. This demand shocks Lomov, who is not willing to give such a large amount of money as a dowry. Bishamber reacts angrily to Lomov's refusal and leaves in a huff.

The demand for dowry is illegal in India, and it is a punishable offense. The government has enacted laws to prevent the practice of dowry, but it still persists in many parts of the country. The dowry system puts a lot of financial burden on the bride's family, and it often leads to harassment, torture and even death of the bride if the dowry demands are not met.

In conclusion, the demand for dowry is a social evil that needs to be eradicated from our society. It puts a lot of financial burden on the bride's family and leads to various forms of harassment. It is important to create awareness among people about the ill-effects of dowry and to take strict action against those who demand or accept dowry.

Option B 5000 rupees is correct. because in starting we came to know that he was not demanding anything as dowry.but at the wedding ceremony, when the saree slipped from Bholi's face he saw all the marks on her face and after that he decided to demand dowry.