Step 1: Understanding the Concept
Crop varieties are named after the crop they belong to, so each statement needs a crop check.
Step 2: Option A
Saccharum barberi was the thin cane of north India. South India had the thick sweet Saccharum officinarum. So A is wrong.
Step 3: Options C and D
Jaya, Ratna and Padma are semi-dwarf rice varieties.
Co 419, 421 and 453 are sugarcane varieties.
Step 4: Option B
Maize hybrid Ganga 3, jowar Co-12 and bajra hybrids have been developed in India, so B is correct.
Final Answer:
The correct statement is the one on Ganga 3, jowar (Co-12) and bajra.
\[ \boxed{\text{(B) }\text{Ganga 3, \textit{Jowar} (Co-12) and \textit{Bajra} have been successfully developed in India.}} \]