Conceptual approach:
Rather than matching term-by-term, recall each pest by the crop it damages and its feeding habit. The cotton mirid bug that punctures cotton squares and bolls is Creontiades biseratense. The sucking bug that damages the earhead of sorghum, causing grain discoloration, is Calocoris angustatus. The polyphagous whitefly that transmits viruses on mung bean and many other crops is Bemisia tabaci. Finally, the shield-shaped stink bug that attacks a wide range of pods and pulses, recognised by its green colour, is Nezara viridula.
Linking pest-crop association with the scientific name in this way reproduces the pairing A-I, B-III, C-IV, D-II.