Match the crops with seed hardening chemicals

crops	seed hardening chemicals
(a) Pearl millet	1. Cycocel
(b) Maize	2. CaCl₂
(c) Cotton	3. KH₂PO₄
(d) Groundnut	4. KCl

Correct option is B

Pearl millet seeds are hardened using KH₂PO₄.
Maize seeds are treated with KCl.
Cotton seeds are hardened with cycocel.
Groundnut seeds are treated with CaCl₂.
Seed hardening improves drought tolerance.
Hence correct order is 3-4-1-2.