Task: Question Answering
Input (English): Question: The effect of anti-D gammaglobulin given to Rh negative women who have developed an Rh positive fetus is: 
 Options:  <1> Eliminate fetal red blood cells from maternal blood. <2> Destroy the antigens formed by the mother's immune system. <3> Avoid the formation of anti-Rh negative antibodies. <4> Induce the formation of maternal antibodies against fetal antigen. <5> Provide the woman with permanent active immunity.
Output (English): 1