Explanation:

The question seems to be about the oldest form of script related to modern Devanagari. The closest related script that is the ancestor of Devanagari is Brahmi.

So the correct answer is:
(D) Brahmi

Explanation:

• Devanagari script evolved from the Brahmi script through the intermediary scripts like Gupta and Siddham.
• Brahmi is considered the oldest known writing system in the Indian subcontinent and the origin of many modern Indian scripts, including Devanagari.
• Prakrit is a language, not a script.
• Kharoshthi is an ancient script but used mainly in northwest India and not related to Devanagari.
• Lobe does not seem to be a recognized script or relevant term here.

✅ Final Answer: (D) Brahmi