The correct answer is (a) 1 Silver and 5 Bronze Medals.
India won a total of 6 medals in the 2012 Summer Olympics, 1 silver and 5 bronze. The silver medal was won by shooter Gagan Narang in the 10 metre air rifle event, while the bronze medals were won by weightlifter Karnam Malleswari in the women’s 48 kg event, wrestler Sushil Kumar in the men’s 66 kg freestyle event, boxer Vijender Singh in the men’s 75 kg event, shooter Vijay Kumar in the 25 metre rapid fire pistol event, and archer Deepika Kumari in the women’s individual event.
Option (b) is incorrect because India won 1 silver medal, not 2. Option (c) is incorrect because India won 3 bronze medals, not 4. Option (d) is incorrect because India won 6 medals in total, not 4.