Statement 1 is correct as the Matriarch - oldest and most dominant - is typically the leader of the herd.
Statement 2 is correct as the gestation period is between 18 -22 months.
Statement 3 is incorrect as Most females give birth for the first time between 14 and 15 years old in African elephants, and slightly later for Asian elephants. Fecundity is fairly constant between the ages of 16 and 40 and then declines slightly, though females over 60 can still give birth.
Statement 4 is incorrect as South India had the highest number of wild elephants - 14,612. Among the south Indian states, Karnataka leads the table with 6,049 elephants followed by Kerala.