FIA Past Paper Sub Inspector Investigation 2018, FIA, General Knowledge MCQsPine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to?A. angiosperms B. gymnosperms C. monocotyledons D. dicotyledons Pollination is best defined as?Ozone hole refers to?