The correct answer is (a). The earthquake was centered near Lamjung, Nepal, about 80 kilometers (50 miles) northwest of Kathmandu. The earthquake had a magnitude of 7.8 and caused widespread damage in Nepal and neighboring countries.
Option (b), Pokhara, is a city in central Nepal that is about 200 kilometers (120 miles) west of Kathmandu. The earthquake caused significant damage in Pokhara, but the city was not the epicenter of the earthquake.
Option (c), Kathmandu, is the capital of Nepal and is located about 80 kilometers (50 miles) northwest of the epicenter of the earthquake. The earthquake caused extensive damage in Kathmandu, including the collapse of many buildings.
Option (d), Rohtasgarh, is a fort in India that is located about 200 kilometers (120 miles) from the epicenter of the earthquake. The earthquake did not cause any significant damage to the fort.