Explanation:

EXPLANATION: 
Establishment of Fort William college atCalcutta to train young recruits was done by lord wellesly. So statement 1 is not correct. 
Cornwallis enforced promotion through seniority.So statement 2 is correct. 
To reduce corruption in the country, Cornwallis was given the authority related to services offered by the East India company.So statement 3 is correct. 

ADDITIONAL INFORMATION:
Lord Cornwallis 1786-1793

(i) Third Mysore War (1790-92) and Treaty of Seringapatam (1792).

• In 1790, Cornwallis declared war on Tipu Sultan, the ruler of Mysore when the latter attacked Travancore, a British-friendly province. Tipu had also refused to release English prisoners taken during the second Anglo-Mysore War.
• After this war, Tipu Sultan had to cede large parts of his kingdom to the British. As a result, the British won Malabar, Dindigul, Baramahal and Coorg.

(ii) Cornwallis Code (1793) incorporating several judicial reforms, and separation of revenue administration and civil jurisdiction.

• Cornwallis established courts in the districts, provinces and states. The highest court was the Supreme Court of Calcutta.
• There were separate courts for civil and criminal cases.
• Cornwallis abolished court fees and then lawyers were to prescribe their fees.
• Government servants could be sued by people for their mistakes.
• He also banned torturous punishments like the chopping off of limbs, nose and ears.

(iii) Permanent Settlement of Bengal, 1793.

• Cornwallis introduced the Permanent Settlement of land revenue in Bengal and other parts of India.
• Under this system, Zamindars or landlords were made the owners of the land, and the farmers were reduced to the status of tenants. The Zamindars had the right to evict the farmers any time.
• The Zamindars had to pay 89% of the land revenue to the British and the remaining was for him.
• Under this system, land revenue was fixed for a term of ten years.
• This system accelerated the drain of wealth from India to Britain.

(iv) Europeanisation of administrative machinery and introduction of civil services.

• To reduce corruption in the country, Cornwallis was given the authority related to services offered by the East India company.
• He established rules which allowed only qualified persons to get into the services irrespective of their connections with higher authorities.
• Top posts were reserved for the Europeans whereas Indians were offered lower grade posts such as Peons and clerks.
• Private trade of the company was abolished completely

(v) Police Reforms

• He took the control of the police from the hands of the landlords to the District Superintendent of Police.
• He established thanas to maintain law and order.
• In 1789, he proclaimed that people practicing slavery would be prosecuted by law.