Which of the following is/are +ve ?

Which of the following can ve used as an emergency contraceptive to avoid possible pregnancy ?

Which of the following can ve used as an emergency contraceptive to avoid possible pregnancy ?

Which of the following is a Gram (-) ve bacterium ?

The strenght of a class is 96 .In it 56 students like cricket and 40 students like football .Which of the following can ve concluded ?