Which of the following is true about Gibberellins? A. Gibberellins are terpenoid compounds, made up of isoprene units. B. GA12 is the precursor of all the other gibberellins. C. GA1 and GA3 are directly responsible for the various effects in plants. D. Size of seedless grapes can be increased by GA applications. E. Gibberellin biosynthesis can be inhibited by application of Auxins. Choose the correct answer from the options given below: