The Chinese writers mention India by the name of

The correct answer is B, Yin-tu. Chinese writers used Yin-tu (also transcribed as Shen-tu or Hsien-tu) for India. It is a Chinese rendering of the Sanskrit Sindhu and Hindu, the name of the land beyond the Indus.

• Fo-Kwo-ki is the travelogue of Fa-Hien (Faxian), who visited India in the early fifth century CE under Chandragupta II. It is a book title, not a name for the country.
• Si-Yu-Ki is Hiuen Tsang's record of the Western Regions, a book title. It is a key source for the Harsha period, but it does not name India.
• Sikia-Pono does not appear as a standard Chinese name for India in these sources, so it is a distractor.

Core concept: the Chinese travel accounts are primary sources for early Indian history and for India's Buddhist and Central Asian connections. Mains angle: how pilgrims and travellers shaped India's image abroad and kept contact with its cultural world alive.

Trap: candidates pick Si-Yu-Ki or Fo-Kwo-ki because they recognise the famous Chinese travellers, forgetting that these are book titles, while the question asks for the name the writers used for the country.