Explanation

Zinc deficiency in cotton is commonly known as 'Mottle leaf' or 'Little leaf', but 'Mottle leaf' is the specific term for the characteristic mottling pattern. However, many sources cite 'Little leaf' as a primary symptom. Let's verify standard agricultural texts. Zinc deficiency causes 'little leaf' and 'rosetting'. Mottle leaf is also used. In multiple choice questions for Pakistani exams (like CSS/Agri), 'Mottle leaf' is often the specific answer for zinc deficiency in cotton, while 'Little leaf' might be associated with other crops or general symptoms. Actually, standard agronomy texts state Zinc deficiency in cotton causes 'little leaf' and 'rosetting'. But wait, some sources say 'mottle leaf' is for zinc in citrus. For cotton, it's typically 'little leaf' and 'rosette'. Let me double check. Cotton zinc deficiency: symptoms include small leaves (little leaf), shortened internodes (rosetting), and pale green/yellow leaves. The term 'Mottle leaf' is sometimes used interchangeably or for specific patterns. However, in the context of PrepBeePakistan MCQs, they often follow specific textbooks. A common exam question asks: 'Zinc deficiency in cotton is known as?' Options: Fern leaf, Mottle leaf, Little leaf. The answer key usually points to 'Mottle leaf' in some contexts or 'Little leaf'. Let's look at the options again. Fern leaf is for Boron? No, Fern leaf is often associated with Nitrogen or general stress, but specifically 'Fern leaf' is a symptom of Zinc deficiency in *citrus*? No. In cotton, Zinc deficiency causes 'Little leaf' and 'Rosette'. However, some sources link 'Mottle leaf' to Zinc deficiency in *cotton* as well. Given the ambiguity, I should check if there's a consensus. Actually, 'Mottle leaf' is the classic symptom of Zinc deficiency in *citrus*. In cotton, it is 'Little leaf'. Therefore, C is likely correct. Wait, let me re-verify. Cotton zinc deficiency: 'Little leaf' and 'rosetting' are the key terms. So C is correct. I will stick with C being correct based on standard agronomy for cotton.