Which among the following statements is true about Gibberellin (GA)?

Correct option is D

✅ (d) GAs are diterpenoids synthesized from MVA
· Gibberellins (GAs) are diterpenoid plant hormones, composed of 20 carbon atoms.
· Their biosynthesis starts from the Mevalonic Acid (MVA) pathway or MEP pathway in plastids.
· MVA pathway is crucial for the formation of isoprenoid intermediates used in GA synthesis.
· GAs play roles in stem elongation, seed germination, and flowering.
❌ (a) GAs are tetraterpenoids synthesized from MVA
· GAs are diterpenoids (C20), not tetraterpenoids (C40).
· Tetraterpenoids include compounds like carotenoids, not gibberellins.
❌ (b) GAs are diterpenoids synthesized from jasmonic acid pathway
· Jasmonic acid pathway is separate from GA biosynthesis.
· GAs are synthesized from geranylgeranyl pyrophosphate (GGPP) via MVA pathway, not jasmonic acid route.
❌ (c) GAs are tetraterpenoids synthesized from jasmonic acid pathway
· Incorrect on two counts: GAs are diterpenoids, not tetraterpenoids, and not synthesized via jasmonic acid pathway.
· This statement combines two false assertions.