Bengaluru Metro Rail (Namma Metro) caters to public transportation needs in:

Entire Karnataka
Mysore city
Hubli-Dharwad region
Bangalore city

The correct answer is D. Bengaluru Metro Rail (Namma Metro) caters to public transportation needs in Bangalore city.

The other options are incorrect because:

  • Option A is incorrect because Bengaluru Metro Rail does not cater to public transportation needs in the entire state of Karnataka. It only caters to public transportation needs in Bangalore city.
  • Option B is incorrect because Bengaluru Metro Rail does not cater to public transportation needs in Mysore city. It only caters to public transportation needs in Bangalore city.
  • Option C is incorrect because Bengaluru Metro Rail does not cater to public transportation needs in the Hubli-Dharwad region. It only caters to public transportation needs in Bangalore city.