How many days after transplanting, pinching operation is performed in marigold?

Correct option is B

Pinching is a horticultural practice where the growing tip of a plant is removed to encourage lateral branching and more flower production.
Key Points:
· In marigold (Tagetes spp.) cultivation:
· Pinching is usually done 40 days after transplanting.
· It encourages:
· Bushy growth,
· More side branches,
· Higher flower yield,
· Uniform flowering.
· How it's done:
· The tender apical portion (top few centimeters) of the main shoot is pinched off by hand.
· Importance:
· Results in better plant shape and increased number of flowers.
· Essential for both African marigold ( Tagetes erecta) and French marigold ( Tagetes patula).
Other Options Explained:
· (a) 30 Days:
· Too early; plants are still establishing and may be too weak for pinching.
· (c) 50 Days and (d) 60 Days:
· Too late; pinching this late can delay flowering and affect market timing.