Value Addition of flowers

• 'Caliper Grade' Measurement in Banana (Musa spp.):
• In international commercial banana trade (Cavendish banana), fruit maturity and sizing are standardized using a precision caliper gauge.
• Measurement Parameter: Caliper grade measures the thickness / diameter / width of the fruit finger (expressed in 32nds of an inch or millimeters).
• Protocol: Measured at the longitudinal midpoint of the median fruit finger situated on the outer whorl of the second commercial hand.
• Standard export grade typically ranges from 39 to 47 caliper units ($31 - 37\text{ mm}$ width).
• Correct Option: Option 2 (Finger width).

• Starch-to-Sugar Breakdown in Cavendish Banana Ripening:
• Green (Stage 1 / Unripe) $\rightarrow$ (IV) $20\%$ Starch: Fully mature green banana pulp is rich in resistant starch ($20 - 25\%$) with minimal free sugars ($1 - 2\%$).
• More yellow than green (Stage 4) $\rightarrow$ (I) $13\%$ Starch: Amylase and starch phosphorylase enzymes progressively convert starch into glucose, fructose, and sucrose; starch drops to approximately $13\%$.
• Yellow with green tip (Stage 5) $\rightarrow$ (III) $7\%$ Starch: Commercial retail stage; starch drops to around $7\%$ while soluble sugars exceed $14\%$.
• Yellow with increasing brown areas (Stage 7 / Overripe) $\rightarrow$ (II) $1.0\%$ Starch: Advanced senescent stage; starch is virtually depleted to around $1.0\%$ with total sugars peaking at $19 - 21\%$.
• Correct Combination: (A)-(III), (B)-(IV), (C)-(I), (D)-(II), matching Option 3.

Correct option: (3) (A) - (III), (B) - (V), (C)- (), (B) - (I)

• Unique Ripening Physiology of Avocado (Persea americana):
• Avocado is a classic climacteric fruit (exhibits sharp peaks in ethylene synthesis and respiration during ripening).
• On-Tree Storage Phenomenon: Uniquely, mature avocado fruits never ripen, soften, or undergo a climacteric rise while attached to the parent tree. They remain firm and physiologically arrested for months.
• The tree produces an endogenous phloem-translocated ripening inhibitor (tree factor). Ripening begins only after the fruit is physically harvested and detached from tree sap.
• Correct Option: Option 4 (Avocado).

• Postharvest Quarantine Phytosanitary Treatments:
• Mandated by international biosecurity authorities to disinfest export consignments of invasive fruit flies and pests:
• Vapour Heat Treatment (VHT): Saturated water vapour applied at $47.5^\circ\text{C}$ for mangoes.
• Irradiation: Ionizing gamma/X-ray irradiation (typically $400\text{ Gy}$).
• Hot Water Treatment (HWT): Immersion in hot water ($48^\circ\text{C}$).
• Sulphitation: A chemical preserving and anti-browning treatment using sulfur dioxide ($SO_2$) in dried raisins and apricots, not a quarantine treatment.
• Correct Option: Option 3 (Sulphitation treatment).