Which of the following monoecious line is used for the development of muskmelon F1 hybrid-Pusa Rasraj?

Answer: Option C

M3 is the monoecious line used for the development of muskmelon F1 hybrid-Pusa Rasraj. A monoecious line M-3 developed at IARI and crossed with Durgapura Madhu gave rise to the F1 hybrid, Pusa Rasraj.
As a result of the development of a true breeding line, the muskmelon hybrid Pusa Rasraj was developed.
These homozygous gynoecious lines are maintained by using GA3, 1500 ppm or silver nitrate 200 - 300 ppm or sodium thiosulphate 400 ppm to induce staminate flowers at two and four true leaf stages.