The correct answer is: D. Kapalmochan
Kapalmochan is a village in the Kurukshetra district of Haryana, India. It is located on the banks of the Saraswati River, about 15 kilometers from Kurukshetra city. The village is known for its archaeological site, which has yielded a number of important artifacts, including coins of the Gupta ruler Samudragupta.
The coins of Samudragupta are made of silver and are inscribed with his name and titles. They are a valuable source of information about the Gupta period, and their discovery at Kapalmochan provides evidence of the Guptas’ presence in Haryana.
The other options are incorrect because they are not places in Haryana where coins of Samudragupta have been found. Mitathal is a village in the Hisar district of Haryana, Rakhigarhi is a village in the Fatehabad district of Haryana, and Banawali is a village in the Hisar district of Haryana. None of these villages have yielded coins of Samudragupta.