A. _______ hormone is most widely used PGR in agriculture.
B. ________ hormone is related with Richmond Lang effect.

Options

A. `{:(A, B), ( "Auxin", CK):}`
B. `{:(A, B), ("Auxin", GA):}`
C. `{:(A, B), ("Ethylene", CK):}`
D. `{:(A, B), (ABA, CK):}`

Answer

**Step-by-Step Solution:**

A. The most widely used plant growth regulator (PGR) in agriculture is **ethylene**. Ethylene is primarily utilized for its role in promoting fruit ripening and maturation, making it a crucial hormone in agricultural practices.

B. The hormone related to the Richmond Lang effect is **cytokinin**. The Richmond Lang effect refers to the stimulation of cell division and growth, which is significantly influenced by the presence of cytokinins. These hormones promote the formation of new cells and contribute to the development of new plant organs.

**Final Answers:**
A. Ethylene
B. Cytokinin

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