Explanation:

The British India government passed a series of acts to improve the social conditions in India. Some of the major ones include -:
Age of Consent Act, 1891

• The Age of Consent Act, 1891, also known as Act X of 1891, was legislation enacted in British India which raised the age of consent for sexual intercourse for all girls, married or unmarried, from ten to twelve years in all jurisdictions, its violation subject to criminal prosecution as rape.
• It was enacted during the tenure of Lord Lansdowne (1888-1894) as the Governor-General.
• Hence, pair 1 is not correctly matched.

Hindu Widows' Remarriage Act, 1856

• It legalised the remarriage of Hindu widows. It was passed owing to the efforts of social reformer Ishwar Chandra Vidyasagar. It was passed during the tenure of Lord Dalhousie (1848-56).
• Hence, pair 2 is correctly matched.

Female Infanticide Prevention Act, 1870

• The Female Infanticide Prevention Act, 1870, implemented by the British Government in the latter part of the nineteenth century was the first statute that aimed to deter people from murdering female infants by penalizing the action and laying down specific punishments for the same.
• It was enacted during the tenure of Lord Mayo (1869-1872) as the Governor-General.
• Hence, pair 3 is not correctly matched.