Regarding Oral Contraceptive pills: 1. Pills have to be taken daily for a period of 21 days starting preferably within the first five days of menstrual cycle. 2. After a gap of 7 days, it has to be repeated in the same pattern till contraconception is desired. 3. Menstruation occurs in between the 21 day course of tablet. Regarding 1,2 and 3:

Question

( a ) 1 is incorrect but 2 and 3 are correct
( b ) 2 is correct but 1 and 3 are incorrect
( c ) 2 is incorrect but 1 and 3 are correct
( d ) 3 is incorrect; 1 and 2 are correct