2nd Jan 1901 means (1900 years and 2 day) Now, 1600 years have 0 odd day 300 years have 1 odd day 2 days has 2 odd day Total no. of odd days = 0 + 1 + 2 = 3 days Hence, the day on 2nd Jan 1901 was Wednesday.
Strait is nothing but a narrow passage of water which connects two seas or other large areas of water. Here Palk strait is the strait that separates India from Sri Lanka.