Q.  A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD?1. DVD supports standard Definition video while BD supports High definition Video.2. Compared to a DVD, the BD format has several times more storage capacity.3. Thickness of BD is 2.4 mm while that of DVD is 1.2 mm.Which of the statements given above is/are correct?

1. 1 only
2. 2 and 3 only
3. 1 and 2 only
4. 1, 2 and 3