Option a is the correct answer. Statement 1 is correct: Chandragupta-II issued silver coins in imitation of the Shaka coins, which bore his name and title on one side and a goddess on the other side. These coins are known as the 'Chandra-Simha' type, as they have the image of a lion (simha) along with the name of Chandragupta (Chandra). These coins are considered to be the strongest evidence of his victory over the Shaka rulers, as they show his authority and influence over their domains. Statement 2 is correct: The weight of these coins used to be about 33 grains. These silver coins were known for their standardized weight, which was approximately 33 grains (about 2.14 grams).